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Number Sense Vocab

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Rational numbers that expressed in decimal format that have fixed number of digits. 1.5 etc.
not equal
product
terminating decimals
irrational numbers

2. The answer to a subtraction problem
factor
difference
composite number
compatible numbers

3. The difference between the greatest and the least numbers in a set of data.
expression
greatest common factor
Invert second term - then multiply
range

4. When a number is larger than the other number. Example 65 > 56
proportion
ratio
greater than
number line

5. 8x8=64 What is 64?
Drop percent - move decimal point two place to left
Greater spread in values
perfect square
Last digit 0 or 5

6. Simplifying complex fractions: two methods
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
compute
expanded form using exponents
Multiplying/dividing number by 1 doesn't change number; multiplying/dividing number by -1 changes sign; sum of number of -1 times number is 0

7. To change a percent to a decimal
0 and 1: Reciprocal greater than number - square less than number - positive number's product smaller than number - negative number's product larger than number; -1 and 0: reciprocal less than number
Drop percent - move decimal point two place to left
inverse property
Last two digits divisible by 4

8. Properties of 1 and -1

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9. To perform a calculation - E.g. 2+2=4
exponents
compute
quotient
associative property

10. Any whole number that ends with 0 - 2 - 4 - 6 - or 8 - any whole number that can be divided by 2
even number
Last digit divisible by 2
commutative property
identity property

11. Number divisible by 4
Drop percent - move decimal point two place to left
irrational numbers
Last two digits divisible by 4
least

12. Standard deviation: greater if...
divisibility by 3 rule
Multiply by 100%
not equal
Greater spread in values

13. In multiplication or addition - the order of two numbers may be switched around and the answer is the same. Ex: a+b = b+a. or (1x2) x 3=1x (2x3)
even number
divisible
commutative property
(Amount of decrease/original whole) x100%

14. The smallest number in a group of numbers
whole number
expanded form using exponents
quotient
least

15. Two expressions that are set equal to each other; a number sentence with an equal sign
equation
compatible numbers
product
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend

16. A fraction whose numerator is greater than its denominator
1 dividing by number
improper fraction
Multiply by 100%
common denominator

17. Natural Numbers - Whole Numbers - Integers - Rational Numbers
Number of desired outcomes/number of total possible outcomes
rational numbers
prime number
Multiply by 100%

18. When you add 0 to a number - or mulltiply a number by 1 - the result is the same number - e.g. Identity Property of Multiplication: 21x1=1x21=21 or 300x 1 = 300
identity property
Last digit 0 or 5
divisible
digit

19. Absolute value of number
distributive property
equal
proportion
Number w/o signs

20. Percent decrease
less than
(Amount of decrease/original whole) x100%
Probability for each event then multiply individual probabilities together
compute

21. A property of real numbers that states that the sum or product of a set of numbers is the same - regardless of how the numbers are grouped - (a+b)+c=a+(b+c) - e.g. (1+2)+3=1+(2+3)
Last digit divisible by 2
evaluate
associative property
Greater spread in values

22. A number that represents a part of a whole or a group; also means 'divided by' - E.g. 1/2 -3/4.5/6
Divisible by 2 and 3
common denominator
Line up decimal points
fraction

23. PEMDAS - Parentheses - Exponents - Multiplication & Division (L to R) - Addition & Subtraction (L to R)
Middle value
composite number
Drop percent - move decimal point two place to left
order of operations

24. A number made up of a whole number and a fraction
number line
Divide by 100%
product
mixed number

25. Able to be divided evenly (without a remainder)
associative property
divisible
commutative property
divisibility by 3 rule

26. A whole number such as 1 - 3 - 5 and so on that cannot be evenly divisible by 2
odd number
Number w/o signs
digit
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend

27. To find the answer for; solve
(Amount of decrease/original whole) x100%
evaluate
range
not equal

28. Median
(Amount of decrease/original whole) x100%
least common multiple
not equal
Middle value

29. Reducing fractions
Multiply by 100%
rational numbers
Divide out largest common factor
Probability for each event then multiply individual probabilities together

30. Average A per B
perfect square
simplify
Sum of digits divisible by 3
Total A/total B

31. The bottom number in a fraction; tells how many parts a whole is divided into OR how many parts in a group - E.g. 2/4 and what position is the 4?
Multiply by 100%
estimate
least common multiple
denominator

32. The expression of a number as a product of prime factors; use a factor tree!
product
odd
prime factorization
composite number

33. A number with more than two factors
difference
composite number
evaluate
denominator

34. A fraction out of 100 - %
Value occurring most frequently
1 dividing by number
inverse property
percent

35. Reciprocal of number
1 dividing by number
percent
Sum of digits divisible by 9
Divisible by 2 and 3

36. Properties of numbers btw -1 and 1

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37. 1/5 + 1/4=4/20 +5/20 and 20 is the...
common denominator
composite number
least common multiple
Number of decimal places is total number of decimals places in factors multiplied

38. The answer to a multiplication problem
product
even
factor
perfect square

39. A letter that represents a value that may change
estimate
perfect square
variables
Invert second term - then multiply

40. Mode
Value occurring most frequently
LCM is LCD
numerator
greatest

41. Two numbers or expressions that mean the same thing - E.g. 2/3=4/6
proportion
equivalent
estimate
compatible numbers

42. Adding/subtracting decimals
Multiplying/dividing number by 1 doesn't change number; multiplying/dividing number by -1 changes sign; sum of number of -1 times number is 0
Line up decimal points
odd
composite number

43. In 4x4=16 - what is 4?
equivalent
variables
root numbers
identity property

44. odd + even
odd
divisibility by 3 rule
compute
Part

45. The property which allows you to add a number's opposite to it and always get 0 - The relationship of addition to subtraction or multiplication to division
composite number
inverse property
distributive property
range

46. To find a number that is close to an exact answer - E.g. 23+24 is around 50
difference
product
Invert second term - then multiply
estimate

47. A number with only two factors - one and itself - E.g. 3 -7 -11 -13 -17 -19...
prime number
product
Original whole +/- amount of change
compatible numbers

48. The value of a digit based on its position within a number - e.g. 2 -432 The position of the numbers
root numbers
LCM is LCD
difference
place value

49. Percent increase
factor
(Amount of increase/original whole) x100%
divisibility by 3 rule
expression

50. A set of operators - numbers - variables and grouping symbols; no equal sign
Last digit divisible by 2
expression
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
least