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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 in decimal form that have a block of on or more digits that repeat continuously
equation
sum
repeating decimals
Add zeros to decimals until all decimals have same number of digits

2. Natural Numbers - Whole Numbers - Integers - Rational Numbers
rational numbers
Greater spread in values
repeating decimals
Adding/subtracting 0 from number doesn't change number; number multiplied by 0 is 0; division by 0 undefined

3. 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.
Total A/total B
equivalent
greatest common factor
compensation

4. Numbers that are easy to compute mentally - E.g. 34 / 5 is close to 35 / 5
compatible numbers
Sum of values/number of values
associative property
Number w/o signs

5. The smallest number that is a multiple of both numbers. (the LCM of 15 and 6 is 30)
perfect square
estimate
least common multiple
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately

6. 8x8=64 What is 64?
Reduce diagonally/vertically then multiply numerators and denominators
Probability for each event then multiply individual probabilities together
digit
perfect square

7. The largest number in a group of numbers
Number of desired outcomes/number of total possible outcomes
Greater spread in values
greatest
range

8. odd + even
product
odd
percent
sum

9. Number divisible by 3
Sum of digits divisible by 9
Last digit 0 or 5
Sum of digits divisible by 3
compatible numbers

10. Percent x whole
Part
Number of desired outcomes/number of total possible outcomes
simplify
Reduce diagonally/vertically then multiply numerators and denominators

11. 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
Number w/o signs
inverse property
composite number
greater than

12. Reciprocal of number
rational numbers
factor pair
1 dividing by number
greatest common factor

13. When a number is larger than the other number. Example 65 > 56
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
greater than
(Amount of decrease/original whole) x100%
quotient

14. Multiple-event probability
Probability for each event then multiply individual probabilities together
number line
odd number
Invert second term - then multiply

15. A number that represents a part of a whole or a group; also means 'divided by' - E.g. 1/2 -3/4.5/6
sum
difference
quotient
fraction

16. New whole
Original whole +/- amount of change
product
Reduce diagonally/vertically then multiply numerators and denominators
denominator

17. In 4x4=16 - what is 4?
divisible
greatest common factor
root numbers
perfect square

18. A shortcut for writing repeated multiplication
exponents
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
Part
Number w/o signs

19. A fraction whose numerator is greater than its denominator
root numbers
improper fraction
Sum of digits divisible by 3
evaluate

20. Be identical or equivalent to
composite number
Divisible by 2 and 3
equal
ratio

21. A number written in expanded form with the place values written in exponential form - E.g. 2432=2000+400+30+2
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
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
equation

22. Comparing positive fractions
Last two digits divisible by 4
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
Line up decimal points

23. Probability
even number
sum
Line up decimal points
Number of desired outcomes/number of total possible outcomes

24. Multiplying decimals
whole number
identity property
Number of decimal places is total number of decimals places in factors multiplied
prime number

25. 1/5 + 1/4=4/20 +5/20 and 20 is the...
greatest common factor
compatible numbers
whole number
common denominator

26. A fraction out of 100 - %
compatible numbers
prime factorization
percent
root numbers

27. Dividing fractions
composite number
Invert second term - then multiply
Value occurring most frequently
numerator

28. Properties of numbers btw -1 and 1

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29. odd + odd
equal
compute
decimal
even

30. A number with more than two factors
percent
composite number
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
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

31. To perform a calculation - E.g. 2+2=4
Divide by 100%
product
factor pair
compute

32. A number that results from multiplying a factor by itself
Part
expression
even
square number

33. Standard deviation: greater if...
Number of decimal places is total number of decimals places in factors multiplied
variables
factor pair
Greater spread in values

34. Answer to a division problem
quotient
whole number
Divide by 100%
Value occurring most frequently

35. Any whole number that ends with 0 - 2 - 4 - 6 - or 8 - any whole number that can be divided by 2
mixed number
associative property
digit
even number

36. PEMDAS - Parentheses - Exponents - Multiplication & Division (L to R) - Addition & Subtraction (L to R)
digit
(Amount of decrease/original whole) x100%
order of operations
Probability for each event then multiply individual probabilities together

37. Simplifying complex fractions: two methods
factor
factor pair
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
Last digit divisible by 2

38. Average A per B
place value
range
denominator
Total A/total B

39. Rational numbers that expressed in decimal format that have fixed number of digits. 1.5 etc.
identity property
divisibility by 3 rule
Drop percent - move decimal point two place to left
terminating decimals

40. Properties of 1 and -1

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41. To drop a percent
commutative property
Divide by 100%
least common multiple
(Amount of increase/original whole) x100%

42. Not identical or equivalent to
not equal
repeating decimals
equal
identity property

43. Add up the digits; if the sum is a multiple of 3 the number is divisible by 3
numerator
fraction
divisibility by 3 rule
proportion

44. Reducing fractions
Line up decimal points
Divide out largest common factor
percent
product

45. The answer to a multiplication problem
product
proportion
ratio
decimal

46. Two expressions that are set equal to each other; a number sentence with an equal sign
repeating decimals
equation
ratio
identity property

47. Dividing decimals
evaluate
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
improper fraction
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend

48. 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)
Line up decimal points
Number w/o signs
commutative property
factor pair

49. 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
numerator
Last digit 0 or 5
Probability for each event then multiply individual probabilities together

50. A number without fractions; an integer- E.g. 0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9...
whole number
simplify
factor pair
Invert second term - then multiply