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Number Sense Vocab

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Choosing numbers close to the numbers in a problem - and then adjusting the answer to compensate for the numbers chosen - E.g. 23 + 18 and 23+20=43 Since 2 was added to 18 to make 20 - we need to take 2 away from 43.
prime number
odd number
compensation
(Amount of increase/original whole) x100%

2. Average value
product
Reduce diagonally/vertically then multiply numerators and denominators
equal
Sum of values/number of values

3. PEMDAS - Parentheses - Exponents - Multiplication & Division (L to R) - Addition & Subtraction (L to R)
order of operations
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
value
fraction

4. A number with only two factors - one and itself - E.g. 3 -7 -11 -13 -17 -19...
Last two digits divisible by 4
prime number
ratio
product

5. The value of a digit based on its position within a number - e.g. 2 -432 The position of the numbers
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
place value
Middle value
not equal

6. Absolute value of number
Number w/o signs
Reduce diagonally/vertically then multiply numerators and denominators
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
Add zeros to decimals until all decimals have same number of digits

7. 8x8=64 What is 64?
quotient
perfect square
even number
improper fraction

8. Dividing decimals
prime factorization
composite number
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
constants

9. Number divisible by 5
simplify
greatest common factor
Last digit 0 or 5
greatest

10. A shortcut for writing repeated multiplication
Last digit 0 or 5
exponents
Last digit divisible by 2
proportion

11. The difference between the greatest and the least numbers in a set of data.
number line
ratio
least
range

12. Rational numbers in decimal form that have a block of on or more digits that repeat continuously
terminating decimals
repeating decimals
identity property
(Amount of decrease/original whole) x100%

13. Numbers that are easy to compute mentally - E.g. 34 / 5 is close to 35 / 5
product
compatible numbers
Drop percent - move decimal point two place to left
place value

14. The expression of a number as a product of prime factors; use a factor tree!
prime factorization
distributive property
whole number
greater than

15. A number that is multiplied by another number to find a producr
constants
Original whole +/- amount of change
factor
odd

16. 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)
identity property
terminating decimals
Multiply by 100%
associative property

17. The smallest number in a group of numbers
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
least
constants
place value

18. Adding/subtracting fractions
LCM is LCD
compatible numbers
Divide by 100%
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

19. An equation showing 2 ratios are equal
proportion
equal
exponents
composite number

20. Able to be divided evenly (without a remainder)
equation
ratio
inverse property
divisible

21. When a number is larger than the other number. Example 65 > 56
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
square number
prime factorization
greater than

22. To find a number that is close to an exact answer - E.g. 23+24 is around 50
Value occurring most frequently
irrational numbers
estimate
improper fraction

23. 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)
commutative property
evaluate
rational numbers
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

24. To find the answer for; solve
constants
evaluate
numerator
Total A/total B

25. Multiple-event probability
Middle value
sum
Probability for each event then multiply individual probabilities together
value

26. Reciprocal of number
(Amount of decrease/original whole) x100%
proportion
evaluate
1 dividing by number

27. A number made up of a whole number and a fraction
equation
mixed number
place value
Last two digits divisible by 4

28. Dividing fractions
equivalent
Value occurring most frequently
Invert second term - then multiply
compatible numbers

29. A fraction out of 100 - %
Probability for each event then multiply individual probabilities together
percent
compatible numbers
prime factorization

30. Two expressions that are set equal to each other; a number sentence with an equal sign
equation
expanded form using exponents
difference
equivalent

31. Comparing decimal fractions
Add zeros to decimals until all decimals have same number of digits
odd number
terminating decimals
fraction

32. Relationship in which a number is smaller than another
Line up decimal points
Value occurring most frequently
Multiply by 100%
less than

33. Add up the digits; if the sum is a multiple of 3 the number is divisible by 3
divisibility by 3 rule
difference
constants
Add zeros to decimals until all decimals have same number of digits

34. Any of the symbols used to write numbers (0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9)
greatest
digit
prime factorization
decimal

35. A number that results from multiplying a factor by itself
root numbers
square number
Sum of digits divisible by 9
not equal

36. 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
(Amount of decrease/original whole) x100%
inverse property
equivalent
evaluate

37. Number divisible by 3
compute
Sum of digits divisible by 3
Sum of digits divisible by 9
value

38. Number divisible by 6
Divisible by 2 and 3
repeating decimals
perfect square
divisible

39. odd + even
range
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
odd
Last digit divisible by 2

40. Simplifying complex fractions: two methods
even
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
not equal
decimal

41. Median
inverse property
Middle value
compensation
Divide out largest common factor

42. Two numbers or expressions that mean the same thing - E.g. 2/3=4/6
root numbers
equivalent
greatest common factor
factor pair

43. To drop a percent
Divide by 100%
(Amount of increase/original whole) x100%
Sum of values/number of values
compute

44. Cannot be expressed in the form a/b. Include square roots of whole numbers that are not perfect squares and non terminating decimals that do not repeat. pi
compatible numbers
least common multiple
LCM is LCD
irrational numbers

45. How much a number is worth
LCM is LCD
value
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
numerator

46. To make a percent
Multiply by 100%
Number of desired outcomes/number of total possible outcomes
Part
commutative property

47. Comparing positive fractions
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
exponents
least
percent

48. 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?
denominator
value
commutative property
composite number

49. A property indicating a special way in which multiplication is applied to addition of two or more numbers in which each term inside a set of parentheses can be multiplied by a factor outside the parentheses - such as a(b + c) = ab + ac - or 7x (4+1)=
distributive property
Adding/subtracting 0 from number doesn't change number; number multiplied by 0 is 0; division by 0 undefined
prime number
Line up decimal points

50. Percent increase
(Amount of increase/original whole) x100%
Sum of digits divisible by 3
Probability for each event then multiply individual probabilities together
Add zeros to decimals until all decimals have same number of digits