1. A rectangle whose sides are all the same length.
square
A rectangle whose sides are all the same length.

2. A rectangular array with the same number of rows as columns.
square array
A rectangular array with the same number of rows as columns.

3. square number 1 4 9 2 16
35 = 35 x 35 = 1225
A number that is the product of a whole number multiplied by itself; a whole number to the second power.

4. The product of number and itself.
square of a number
The product of number and itself.

5. A pyramid with a square base.
square pyramid
A pyramid with a square base.

6. square root of a number 320= 2*2*2*2*2*2*5 320= 4*4*4*5 or 320=16*4*5
√320=8√5
The square root of a number n is a number which, when multiplied by itself, results in the number n.

7. The units used to measure area.
square units
7 square units
The units used to measure area.

8. standard notation 587 = 500 + 60 + 7 standard notation
expanded notation
standard notation
The most familiar way of representing whole numbers, integers, and decimals by writing digits in specified place.

9. A uniform unit of measure.
standard unit
A uniform unit of measure.

10. A graph that looks like steps.
step graph
A graph that looks like steps.

11. stem-and-leaf plot
A display of data in which digits with larger place values are named as stems, and digits with smaller place values are names as leaves.

12. A tool used to draw a line segment.
straightedge
A tool used to draw a line segment.

13. subtraction 7
- 3
minuend
subtrahend 4
difference
A math operation based on taking away one quantity from another or decreasing quantity.

14. The number being subtracted.
subtrahend 7
- 3
minuend
subtrahend 4
difference
The number being subtracted.

15. The answer to an adding problem.
sum
addends
sum
= 35
The answer to an adding problem.

16. Two angels whose measures total 180 .
supplementary angels
Two angels whose measures total 180 . o

17. Collection data for graphing and analysis.
survey
Collection data for graphing and analysis.

18. symmetry
The property of exact balance in a figure; having the same size and shape across a dividing line.

19. The matching of two halves of a shape.
symmetry
The matching of two halves of a shape.

20. Marks used to keep track of a count.
tally marks 11 5 10
Marks used to keep track of a count.

21. tally chart
Tally charts are used to organize and display data. A tally chart is a table that shows how many times each value appears.

22. Intersecting at exactly one point.
tangent
Intersecting at exactly one point.

23. A pattern used as a guide in making something accurately.
template
A pattern used as a guide in making something accurately.

24. The place-value position equal to ten times the unit value.
tens 59
270
The place-value position equal to ten times the unit value.

25. term
In an algebraic expression or equation, a number or a product of a number and one or more variables.

26. Decimals that continue a pattern without end.
terminating decimal
.333… 1 3
= .30
Decimals that continue a pattern without end.

27. tessellation
An arrangement of closed shapes that covers a surface completely without overlaps or gaps.

28. A polyhedron with four faces.
tetrahedron
A polyhedron with four faces.

29. theorem
A mathematical statement that can be proven to be true (or sometimes, a statement that is proposed and needs to be proven).

30. Objects with thickness,length and width.
3-dimensional (3-D)
Objects with thickness,length and width.

31. Objects that are not completely within a single flat surface.
3-dimensional (3-D)
Objects that are not completely within a single flat surface.

32. tile
A shape used in a tessellation. If only one shape is repeated in a tessellation, the tessellation is called a same-tile tessellation.

33. tiling
An arrangement of closed shapes that covers a surface completely without overlaps or gaps.

34. A number line showing years, days,and events in a sequence.
time line
A number line showing years, days,and events in a sequence.

35. A bag containing things needed in math.
tool kit
A bag containing things needed in math.

36. top-heavy fraction
A fraction that names a number greater than or equal to 1; a fraction whose numerator is equal to or greater than its denominator.

37. trade-first subtraction
Subtraction procedure in which all necessary trades are done before any subtractions are carried out.

38. trapezoid
A quadrilateral that has one pair of parallel sides. No two sides need to be the same length.

39. The motion of “sliding” an object or picture along a straight line.
translation
The motion of “sliding” an object or picture along a straight line.

40. transparent mirror
A mirror with a front and back face that has a recessed edge used for drawing lines of symmetry.

41. triangle
A 3-sided polygon.

42. A prism whose bases are triangles.
triangular prism
A prism whose bases are triangles.

43. A pyramid whose bases (faces) are triangles.
triangular pyramid
A pyramid whose bases (faces) are triangles.

44. A digit(s) followed by 12 whole-number places.
trillion
One trillion written
in number form is
1,000,000,000,000
in exponential form 10 12
A digit(s) followed by 12 whole-number places.

45. triple
Three times an amount.

46. turn
Rotation.

47. turn-around facts
6 + 3
3 + 6
2 x 3
3 x 2
234 x 5
5 x 234
A pair of add or multiplication facts in which the order of the addends or the factors is reversed.

48. Two prime numbers that are separated by just one composite number.
twin primes
3 and 5 are twin primes,
because they are
separated by the
composite number 4.
Two prime numbers that are separated by just one composite number.

49. 2-dimensional (2-D)
Objects completely within a flat surface; objects with length and width, but no thickness.

50. unit
24 children
27 ducks
1 kg
3 o’clock
30 cents
A label, descriptive word, or unit of measure used to put a number in context.

51. unit
ONE of something,

52. A box displayed alongside a set of numbers or problems.
unit box
Unit
Unit
cents
Unit
days
dogs
Unit
Unit
inches
bats
A box displayed alongside a set of numbers or problems.

53. unit fraction
A fraction that names one of the equal parts of the whole. The numerator is always 1.

54. unit marks
The equidistant makes that represent numbers on thermometers, rulers, and other scales of measurement.

55. The standard measuring system used in the United States.
U.S. customary system
Weight
ounce
pound
Capacity
cup
pint
quart
gallon
Distance
inch
foot
yard
mile
Temperature
Fahrenheit
The standard measuring system used in the United States.

56. variable
A letter other symbol that represents a number. A variable need not represent one specific number; it can stand for many different values.

57. vertex (vertices)
The point at which the rays or line segments of an angle, sides of a polygon, or the ends of a polyhedron meet.

58. vertical angles
Two intersecting lines form four angles. Two angles with the same vertex, but no sides in common.

59. The measure of the amount of space a 3-dimensional shape takes up.
volume
The measure of the amount of space a 3-dimensional shape takes up.

60. A measure of how heavy something is.
weight
A measure of how heavy something is.

61. “What’s My Rule?”
A routine that involves a set of number pairs in with the numbers in each pair are related to each other according to the same rule.

62. whole
The entire object, collection of objects, or quantity being considered; the ONE, the unit, 100%.

63. whole number
Any of the numbers.

64. Whole number
1, 2, 3, 4, …
Any of the numbers.

65. width of a rectangle
Length of one side of a rectangle or rectangular object; often the shorter side.

66. X-by-y array
Array of Dots
Array of squares
2-by-6 arrays: 2 rows, 6 per row
An arrangement having x rows of y per row, representing x set of y objects in each set.

67. Standard unit of length equal to 3 feet or 36 inches.
yard (yd) 1 2 3
Standard unit of length equal to 3 feet or 36 inches.

68. zero facts 0 + 5 = 5 4 x 0 = 0 8 + 0 = 8 0 x 8 = 0 0 + 6 = 6 7 x 0 = 0
The sum of two 1-digit numbers where one of the addends is zero. The product of two 1 digit numbers. The produce is always 0.

69. zone
A group of locations, usually determined by distances, for which a uniform rate is charged by a delivery or transportation system.