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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.
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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.
root numbers
Middle value
Sum of digits divisible by 9
compensation

2. 8x8=64 What is 64?
equivalent
perfect square
greater than
product

3. Answer to a division problem
decimal
Last two digits divisible by 4
quotient
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

4. To drop a percent
Divide by 100%
improper fraction
equivalent
least common multiple

5. Two factors together that are multiplied to equal a larger number.
whole number
perfect square
quotient
factor pair

6. The answer to an addition problem
Divide out largest common factor
factor pair
sum
Number w/o signs

7. 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?
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
denominator
even
root numbers

8. Be identical or equivalent to
compute
equal
Sum of digits divisible by 3
Adding/subtracting 0 from number doesn't change number; number multiplied by 0 is 0; division by 0 undefined

9. The largest number in a group of numbers
greatest
difference
LCM is LCD
Invert second term - then multiply

10. The smallest number that is a multiple of both numbers. (the LCM of 15 and 6 is 30)
Reduce diagonally/vertically then multiply numerators and denominators
least common multiple
evaluate
mixed number

11. Rational numbers that expressed in decimal format that have fixed number of digits. 1.5 etc.
perfect square
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
divisibility by 3 rule
terminating decimals

12. A fraction whose numerator is greater than its denominator
even number
percent
Last two digits divisible by 4
improper fraction

13. A number that results from multiplying a factor by itself
evaluate
order of operations
Total A/total B
square number

14. odd + even
repeating decimals
Number of desired outcomes/number of total possible outcomes
estimate
odd

15. A number with more than two factors
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
difference
composite number
square number

16. Properties of numbers btw -1 and 1

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17. Properties of 0

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18. To perform a calculation - E.g. 2+2=4
compute
composite number
Line up decimal points
Greater spread in values

19. When a number is larger than the other number. Example 65 > 56
Value occurring most frequently
greater than
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
denominator

20. A value that does not change; any number
prime number
odd number
commutative property
constants

21. In 4x4=16 - what is 4?
divisible
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
quotient
root numbers

22. A number without fractions; an integer- E.g. 0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9...
Divide out largest common factor
compensation
whole number
1 dividing by number

23. Adding/subtracting fractions
LCM is LCD
1 dividing by number
difference
variables

24. The answer to a subtraction problem
difference
identity property
odd number
least common multiple

25. To place a fraction in lowest terms
fraction
simplify
composite number
1 dividing by number

26. A whole number such as 1 - 3 - 5 and so on that cannot be evenly divisible by 2
percent
odd number
Number of decimal places is total number of decimals places in factors multiplied
order of operations

27. The greatest whole number that is a factor of two or more nonzero whole numbers
1 dividing by number
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
greatest common factor
variables

28. 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
even
irrational numbers
quotient
Last digit divisible by 2

29. To change a percent to a decimal
Drop percent - move decimal point two place to left
terminating decimals
range
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately

30. Dividing fractions
Number of decimal places is total number of decimals places in factors multiplied
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend
Invert second term - then multiply
greater than

31. 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
inverse property
Reduce diagonally/vertically then multiply numerators and denominators
Invert second term - then multiply
1 dividing by number

32. Percent increase
Divide by 100%
Multiply by 100%
Divisible by 2 and 3
(Amount of increase/original whole) x100%

33. Multiple-event probability
factor
Sum of digits divisible by 9
Probability for each event then multiply individual probabilities together
odd number

34. Two expressions that are set equal to each other; a number sentence with an equal sign
expression
equation
less than
product

35. 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
Last digit divisible by 2
improper fraction
greater than

36. The number at the top of a fraction; stands for the parts of a set you are considering - E.g. 3/4 What position is 3?
(Amount of increase/original whole) x100%
irrational numbers
distributive property
numerator

37. Number divisible by 3
Add zeros to decimals until all decimals have same number of digits
(Amount of decrease/original whole) x100%
identity property
Sum of digits divisible by 3

38. Comparing positive fractions
percent
variables
factor
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value

39. Comparing decimal fractions
estimate
terminating decimals
greatest common factor
Add zeros to decimals until all decimals have same number of digits

40. Standard deviation: greater if...
prime factorization
associative property
Last digit divisible by 2
Greater spread in values

41. The expression of a number as a product of prime factors; use a factor tree!
equivalent
Part
prime factorization
quotient

42. Reducing fractions
Divide out largest common factor
Middle value
compensation
range

43. Number divisible by 2
Last digit divisible by 2
inverse property
constants
Adding/subtracting 0 from number doesn't change number; number multiplied by 0 is 0; division by 0 undefined

44. Number divisible by 5
mixed number
Last digit 0 or 5
Last two digits divisible by 4
Reduce diagonally/vertically then multiply numerators and denominators

45. The answer to a multiplication problem
not equal
even number
product
LCM is LCD

46. The difference between the greatest and the least numbers in a set of data.
range
product
equivalent
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

47. To find a number that is close to an exact answer - E.g. 23+24 is around 50
estimate
Probability for each event then multiply individual probabilities together
prime factorization
Number w/o signs

48. Rational numbers in decimal form that have a block of on or more digits that repeat continuously
less than
Last digit divisible by 2
repeating decimals
Adding/subtracting 0 from number doesn't change number; number multiplied by 0 is 0; division by 0 undefined

49. Number divisible by 4
Reduce diagonally/vertically then multiply numerators and denominators
Last two digits divisible by 4
composite number
Middle value

50. A fraction out of 100 - %
odd number
digit
percent
equation

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Number Sense Vocab

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