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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. A number with more than two factors
greater than
equation
composite number
equivalent

2. 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
rational numbers
identity property
Original whole +/- amount of change
distributive property

3. Number divisible by 4
Sum of values/number of values
mixed number
Last two digits divisible by 4
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend

4. 1/5 + 1/4=4/20 +5/20 and 20 is the...
Middle value
equal
common denominator
denominator

5. A number with only two factors - one and itself - E.g. 3 -7 -11 -13 -17 -19...
expanded form using exponents
prime number
divisibility by 3 rule
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

6. Median
divisibility by 3 rule
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
fraction
Middle value

7. Properties of 0

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8. A shortcut for writing repeated multiplication
greatest common factor
(Amount of increase/original whole) x100%
Multiply by 100%
exponents

9. Dividing fractions
number line
Sum of digits divisible by 9
Invert second term - then multiply
expanded form using exponents

10. Probability
common denominator
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
Number of desired outcomes/number of total possible outcomes
whole number

11. Properties of 1 and -1

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12. Number divisible by 5
difference
Last digit 0 or 5
sum
evaluate

13. Be identical or equivalent to
product
Total A/total B
equal
simplify

14. Percent decrease
Probability for each event then multiply individual probabilities together
LCM is LCD
(Amount of decrease/original whole) x100%
even

15. A number written in expanded form with the place values written in exponential form - E.g. 2432=2000+400+30+2
factor
equivalent
expanded form using exponents
Reduce diagonally/vertically then multiply numerators and denominators

16. Natural Numbers - Whole Numbers - Integers - Rational Numbers
common denominator
Middle value
product
rational numbers

17. Average A per B
even
Total A/total B
fraction
Part

18. Comparing decimal fractions
greater than
Add zeros to decimals until all decimals have same number of digits
product
improper fraction

19. 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.
divisible
repeating decimals
compensation
Line up decimal points

20. New whole
irrational numbers
mixed number
product
Original whole +/- amount of change

21. Any of the symbols used to write numbers (0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9)
ratio
(Amount of increase/original whole) x100%
Total A/total B
digit

22. The answer to a subtraction problem
difference
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
irrational numbers
equal

23. Not identical or equivalent to
least common multiple
compatible numbers
expanded form using exponents
not equal

24. An equation showing 2 ratios are equal
proportion
expression
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
mixed number

25. Average value
divisible
proportion
Sum of values/number of values
compensation

26. Multiplying fractions
not equal
Number of decimal places is total number of decimals places in factors multiplied
product
Reduce diagonally/vertically then multiply numerators and denominators

27. To drop a percent
even number
root numbers
Divide by 100%
terminating decimals

28. A value that does not change; any number
constants
Invert second term - then multiply
compute
divisible

29. To find a number that is close to an exact answer - E.g. 23+24 is around 50
proportion
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
estimate

30. Dividing decimals
greater than
exponents
range
Multiply by power of 10 so divisor is integer; decimal point is above that in dividend

31. A letter that represents a value that may change
variables
Divide by 100%
Line up decimal points
digit

32. A fraction out of 100 - %
digit
percent
Middle value
Drop percent - move decimal point two place to left

33. In 4x4=16 - what is 4?
ratio
Total A/total B
composite number
root numbers

34. Number divisible by 3
Sum of digits divisible by 3
number line
factor pair
numerator

35. Answer to a multiplication problem
product
Middle value
prime factorization
greater than

36. The answer to a multiplication problem
estimate
product
simplify
place value

37. Number divisible by 9
Sum of digits divisible by 9
decimal
Last two digits divisible by 4
whole number

38. Able to be divided evenly (without a remainder)
divisible
compatible numbers
Distributive law: multiply by LCM of all denominators; treat numerator/denominator separately
improper fraction

39. Absolute value of number
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
Number w/o signs
least
Greater spread in values

40. Adding/subtracting fractions
Total A/total B
LCM is LCD
distributive property
common denominator

41. Rational numbers that expressed in decimal format that have fixed number of digits. 1.5 etc.
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
terminating decimals
identity property
improper fraction

42. The expression of a number as a product of prime factors; use a factor tree!
Last digit 0 or 5
compensation
prime factorization
number line

43. Reciprocal of number
1 dividing by number
perfect square
difference
Value occurring most frequently

44. A comparison of 2 numbers; one form is a fraction
composite number
Number w/o signs
ratio
Divisible by 2 and 3

45. Adding/subtracting decimals
Greater spread in values
Number of desired outcomes/number of total possible outcomes
prime factorization
Line up decimal points

46. The largest number in a group of numbers
greatest
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
not equal
compensation

47. The smallest number in a group of numbers
least common multiple
least
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

48. Comparing positive fractions
Same numerators: fraction w/ smaller denominator has larger value; Same denominators: fraction w/ larger numerator has larger value
difference
LCM is LCD
variables

49. Percent increase
LCM is LCD
root numbers
(Amount of increase/original whole) x100%
terminating decimals

50. 8x8=64 What is 64?
difference
perfect square
LCM is LCD
percent

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Number Sense Vocab

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