Math Glossary

Simple Math Glossary suitable for 1st Grade Children:

1. Number: A symbol that represents a quantity or count.
2. Count: To say numbers in order to find out how many there are.
3. Addition: Putting numbers together to find the total.
4. Subtraction: Taking away one number from another to find the difference.
5. Equal: When two amounts are the same.
6. Greater: One number is larger than another number.
7. Less: One number is smaller than another number.
8. Pattern: A sequence of shapes, numbers, or colors that repeats.
9. Shape: A flat, enclosed figure with sides and angles.
10. Circle: A shape with all points the same distance from the center.
11. Square: A shape with four equal sides and four right angles.
12. Rectangle: A shape with four sides and four right angles, but opposite sides are not equal.
13. Triangle: A shape with three sides and three angles.
14. Line: A straight path that goes on forever in both directions.
15. Curve: A line that is not straight.
16. Length: How long something is.
17. Height: How tall something is.
18. Width: How wide something is.
19. Time: The measurement of when things happen.
20. Clock: A device that shows the time.
21. Hour: A unit of time that is 60 minutes.
22. Minute: A unit of time that is 60 seconds.
23. Calendar: A chart that shows the days, weeks, and months of the year.
24. Money: Coins and bills used to buy things.
25. Penny: A coin worth one cent.
26. Dime: A coin worth ten cents.
27. Quarter: A coin worth twenty-five cents.
28. Half: Half of something is one part out of two equal parts.
29. Whole: The complete amount of something.
30. Sort: To put things in groups based on their similarities.

Simple Math Glossary suitable for 2nd Grade Children:

1. Number: A symbol that shows how many or how much of something.
2. Count: To say numbers in order to find out the total.
3. Addition: Putting numbers together to find the total or sum.
4. Subtraction: Taking away one number from another to find the difference.
5. Equal: When two amounts or numbers are the same.
6. Greater: One number is larger or more than another number.
7. Less: One number is smaller or fewer than another number.
8. Pattern: A sequence of shapes, numbers, or colors that repeats.
9. Shape: The form or outline of something, like a square, circle, or triangle.
10. Rectangle: A shape with four sides and four right angles, opposite sides are equal in length.
11. Triangle: A shape with three sides and three angles.
12. Circle: A round shape with no corners and all points on the edge are the same distance from the center.
13. Line: A straight path that goes on forever in both directions.
14. Curve: A line that bends or is not straight.
15. Length: How long something is, measured from end to end.
16. Height: How tall something is, measured from bottom to top.
17. Width: How wide something is, measured from side to side.
18. Time: The measurement of when things happen.
19. Clock: A device that shows the time.
20. Hour: A unit of time equal to 60 minutes.
21. Minute: A unit of time equal to 60 seconds.
22. Calendar: A chart that shows the days, weeks, and months of the year.
23. Money: Coins and bills used to buy things.
24. Penny: A coin worth one cent.
25. Nickel: A coin worth five cents.
26. Dime: A coin worth ten cents.
27. Quarter: A coin worth twenty-five cents.
28. Half-dollar: A coin worth fifty cents.
29. Dollar: A coin or bill worth one dollar.
30. Sort: To arrange things in groups based on their similarities.

50 math-related terms in a Glossary suitable for 3rd Grade children:

1. Number: A symbol used to represent quantity.
2. Count: To determine how many there are by saying numbers.
3. Addition: Combining numbers to find the total.
4. Subtraction: Taking away one number from another to find the difference.
5. Multiplication: Repeated addition, finding the total of equal groups.
6. Division: Sharing or grouping a number into equal parts.
7. Equal: When two amounts or numbers are the same.
8. Greater: One number is larger or more than another.
9. Less: One number is smaller or fewer than another.
10. Pattern: A repeated sequence of shapes, numbers, or colors.
11. Shape: The form of an object, like a square, triangle, or circle.
12. Rectangle: A four-sided shape with opposite sides of equal length and four right angles.
13. Triangle: A three-sided shape with three angles.
14. Circle: A round shape with all points equidistant from the center.
15. Line: A straight path that goes on forever in both directions.
16. Angle: The space between two lines that meet at a point.
17. Perimeter: The distance around the outside of a shape.
18. Area: The amount of space inside a shape.
19. Time: Measurement of events and intervals.
20. Clock: A device displaying the time.
21. Hour: A unit of time equal to 60 minutes.
22. Minute: A unit of time equal to 60 seconds.
23. Calendar: A chart showing days, weeks, and months.
24. Money: Coins and bills used for transactions.
25. Dollar: A coin or bill worth one dollar.
26. Cent: A coin worth one hundredth of a dollar.
27. Place Value: The value of a digit based on its position in a number.
28. Rounding: Approximating a number to a specific place value.
29. Fraction: A part of a whole, written as a/b.
30. Decimal: A number with a decimal point.
31. Graph: A visual representation of data.
32. Bar Graph: A graph with bars representing data.
33. Line Graph: A graph using lines to show changes over time.
34. Pattern: A sequence that repeats.
35. Prime Number: A number divisible only by 1 and itself.
36. Composite Number: A number with factors other than 1 and itself.
37. Even Number: A number divisible by 2.
38. Odd Number: A number not divisible by 2.
39. Factor: A number that divides into another number evenly.
40. Multiple: The product of a number and an integer.
41. Word Problem: A math problem described in words.
42. Estimate: An approximate value.
43. Symmetry: A balance in shape, size, or arrangement.
44. Quadrilateral: A shape with four sides.
45. Vertex (Vertices): The point where lines meet in a shape.
46. Parallel Lines: Lines that never intersect.
47. Perpendicular Lines: Lines that meet at a 90-degree angle.
48. Geometry: The study of shapes and their properties.
49. Number Line: A line with numbers placed in order.
50. Data: Information collected and used for analysis.

An extended Math Glossary with 75 terms suitable for 4th Grade children:

1. Number: A symbol used to represent a quantity.
2. Count: To determine how many by saying numbers.
3. Addition: Combining numbers to find the total.
4. Subtraction: Taking away one number from another.
5. Multiplication: Repeated addition, finding the total of equal groups.
6. Division: Sharing or grouping a number into equal parts.
7. Equal: When two amounts or numbers are the same.
8. Greater: A number is larger or more than another.
9. Less: A number is smaller or fewer than another.
10. Pattern: A sequence that repeats.
11. Place Value: The value of a digit based on its position in a number.
12. Rounding: Approximating a number to a specific place value.
13. Decimal: A number with a decimal point.
14. Fraction: A part of a whole, written as a/b.
15. Mixed Number: A whole number and a fraction combined.
16. Improper Fraction: A fraction where the numerator is greater than the denominator.
17. Equivalent Fractions: Fractions that represent the same value.
18. Additive Inverse: A number that, when added to another, gives a sum of zero.
19. Multiple: The product of a number and an integer.
20. Divisor: The number by which another number is divided.
21. Prime Number: A number divisible only by 1 and itself.
22. Composite Number: A number with factors other than 1 and itself.
23. Even Number: A number divisible by 2.
24. Odd Number: A number not divisible by 2.
25. Factors: Numbers that divide into another number evenly.
26. Prime Factorization: Breaking a number down into its prime factors.
27. Area: The amount of space inside a shape.
28. Perimeter: The distance around the outside of a shape.
29. Geometry: The study of shapes and their properties.
30. Quadrilateral: A shape with four sides.
31. Polygon: A closed shape with straight sides.
32. Angle: The space between two lines that meet at a point.
33. Right Angle: An angle that measures 90 degrees.
34. Acute Angle: An angle less than 90 degrees.
35. Obtuse Angle: An angle greater than 90 degrees.
36. Symmetry: A balance in shape, size, or arrangement.
37. Data: Information collected and used for analysis.
38. Bar Graph: A graph with bars representing data.
39. Line Graph: A graph using lines to show changes over time.
40. Pictograph: A graph using pictures or symbols to represent data.
41. Capacity: The amount a container can hold.
42. Measurement: The size, length, or amount of something.
43. Time: Measurement of events and intervals.
44. Clock: A device displaying the time.
45. Calendar: A chart showing days, weeks, and months.
46. Elapsed Time: The time that has passed between two events.
47. Multiples: Numbers that result from multiplying a given number by other whole numbers.
48. Line of Symmetry: A line that divides a shape into two equal halves.
49. Parallel Lines: Lines that never intersect.
50. Perpendicular Lines: Lines that meet at a 90-degree angle.
51. Right Triangle: A triangle with one 90-degree angle.
52. Obtuse Triangle: A triangle with one obtuse angle (greater than 90 degrees).
53. Acute Triangle: A triangle with all angles acute (less than 90 degrees).
54. Equilateral Triangle: A triangle with all sides of equal length.
55. Isosceles Triangle: A triangle with two sides of equal length.
56. Scalene Triangle: A triangle with all sides of different lengths.
57. Volume: The amount of space inside a 3D shape.
58. Cylinder: A 3D shape with two circular bases and curved sides.
59. Sphere: A 3D shape that is perfectly round.
60. Cone: A 3D shape with a circular base and a pointed top.
61. Cube: A 3D shape with six square faces of equal size.
62. Rectangle: A 3D shape with six rectangular faces.
63. Surface Area: The total area of all the surfaces of a 3D shape.
64. Line Plot: A graph that uses marks (Xs) above a number line to show data.
65. Mode: The number that appears most frequently in a set of data.
66. Median: The middle number in a set of data when arranged in order.
67. Range: The difference between the largest and smallest numbers in a set of data.
68. Tally Marks: Marks used to keep track of numbers, often in groups of five.
69. Frequency Table: A table that shows the number of times each value appears in a data set.
70. Equation: A mathematical statement with an equal sign, showing two expressions are equal.
71. Variable: A letter or symbol used to represent a value in an equation.
72. Addend: A number being added in an addition problem.
73. Subtrahend: A number being subtracted in a subtraction problem.
74. Dividend: A number being divided in a division problem.
75. Quotient: The result of a division problem.

A comprehensive Math Glossary with 100 terms suitable for 5th Grade children:

1. Number: A symbol used to represent a quantity.
2. Count: To determine how many by saying numbers.
3. Addition: Combining numbers to find the total.
4. Subtraction: Taking away one number from another.
5. Multiplication: Repeated addition, finding the total of equal groups.
6. Division: Sharing or grouping a number into equal parts.
7. Equal: When two amounts or numbers are the same.
8. Greater: A number is larger or more than another.
9. Less: A number is smaller or fewer than another.
10. Pattern: A sequence that repeats.
11. Place Value: The value of a digit based on its position in a number.
12. Rounding: Approximating a number to a specific place value.
13. Decimal: A number with a decimal point.
14. Fraction: A part of a whole, written as a/b.
15. Mixed Number: A whole number and a fraction combined.
16. Improper Fraction: A fraction where the numerator is greater than the denominator.
17. Equivalent Fractions: Fractions that represent the same value.
18. Additive Inverse: A number that, when added to another, gives a sum of zero.
19. Multiple: The product of a number and an integer.
20. Divisor: The number by which another number is divided.
21. Dividend: The number being divided.
22. Quotient: The result of a division.
23. Prime Number: A number divisible only by 1 and itself.
24. Composite Number: A number with factors other than 1 and itself.
25. Even Number: A number divisible by 2.
26. Odd Number: A number not divisible by 2.
27. Factors: Numbers that divide into another number evenly.
28. Prime Factorization: Breaking a number down into its prime factors.
29. Area: The amount of space inside a shape.
30. Perimeter: The distance around the outside of a shape.
31. Geometry: The study of shapes and their properties.
32. Quadrilateral: A shape with four sides.
33. Polygon: A closed shape with straight sides.
34. Angle: The space between two lines that meet at a point.
35. Right Angle: An angle that measures 90 degrees.
36. Acute Angle: An angle less than 90 degrees.
37. Obtuse Angle: An angle greater than 90 degrees.
38. Straight Angle: An angle that measures 180 degrees.
39. Symmetry: A balance in shape, size, or arrangement.
40. Data: Information collected and used for analysis.
41. Bar Graph: A graph with bars representing data.
42. Line Graph: A graph using lines to show changes over time.
43. Pictograph: A graph using pictures or symbols to represent data.
44. Capacity: The amount a container can hold.
45. Measurement: The size, length, or amount of something.
46. Time: Measurement of events and intervals.
47. Clock: A device displaying the time.
48. Calendar: A chart showing days, weeks, and months.
49. Elapsed Time: The time that has passed between two events.
50. Multiples: Numbers that result from multiplying a given number by other whole numbers.
51. Line of Symmetry: A line that divides a shape into two equal halves.
52. Parallel Lines: Lines that never intersect.
53. Perpendicular Lines: Lines that meet at a 90-degree angle.
54. Right Triangle: A triangle with one 90-degree angle.
55. Obtuse Triangle: A triangle with one obtuse angle (greater than 90 degrees).
56. Acute Triangle: A triangle with all angles acute (less than 90 degrees).
57. Equilateral Triangle: A triangle with all sides of equal length.
58. Isosceles Triangle: A triangle with two sides of equal length.
59. Scalene Triangle: A triangle with all sides of different lengths.
60. Volume: The amount of space inside a 3D shape.
61. Cylinder: A 3D shape with two circular bases and curved sides.
62. Sphere: A 3D shape that is perfectly round.
63. Cone: A 3D shape with a circular base and a pointed top.
64. Cube: A 3D shape with six square faces of equal size.
65. Rectangle: A 3D shape with six rectangular faces.
66. Surface Area: The total area of all the surfaces of a 3D shape.
67. Line Plot: A graph that uses marks (Xs) above a number line to show data.
68. Mode: The number that appears most frequently in a set of data.
69. Median: The middle number in a set of data when arranged in order.
70. Range: The difference between the largest and smallest numbers in a set of data.
71. Tally Marks: Marks used to keep track of numbers, often in groups of five.
72. Frequency Table: A table that shows the number of times each value appears in a data set.
73. Equation: A mathematical statement with an equal sign, showing two expressions are equal.
74. Variable: A letter or symbol used to represent a value in an equation.
75. Addend: A number being added in an addition problem.
76. Subtrahend: A number being subtracted in a subtraction problem.
77. Product: The result of multiplication.
78. Ratio: A comparison of two quantities using division.
79. Percent: A portion out of 100, often represented by the symbol "%".
80. Decimal Fraction: A fraction with a denominator that is a power of 10.
81. Equivalent Decimals: Decimals that represent the same value.
82. Least Common Multiple (LCM): The smallest multiple that two or more numbers share.
83. Greatest Common Divisor (GCD): The largest number that divides two or more numbers evenly.
84. Square Root: A number that, when multiplied by itself, gives the original number.
85. Exponent: A small number written above and to the right of a base number, indicating repeated multiplication.
86. Base: The number being raised to an exponent.
87. Order of Operations: The sequence in which calculations are performed (PEMDAS/BODMAS).
88. Integers: Positive and negative whole numbers, including zero.
89. Absolute Value: The distance of a number from zero on a number line.
90. Proportion: An equation stating that two ratios are equal.
91. Variable: A letter or symbol used to represent an unknown value.
92. Expression: A mathematical phrase involving numbers, variables, and operations.
93. Inequality: A mathematical sentence comparing two expressions, using symbols like <, >, ≤, or ≥.
94. Perimeter: The distance around the outside of a shape.
95. Probability: The likelihood of an event happening.
96. Prime Number: A number that only has two factors: 1 and itself.
97. Ratio: A comparison of two quantities using division.
98. Simplest Form: The most reduced form of a fraction.
99. Dividend: A number being divided.
100. Quotient: The result of a division.