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18 Cards in this Set
- Front
- Back
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Which of these are not integers?
-2, 0, 3/2, 2.5, 1 |
fractions are not integers. any number, positive or negative, including 0 on a number line are integers.
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Is 0 odd or even? Positive or negative?
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even. neither positive nor negative.
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Is 1/2 even or odd?
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neither. fractions are neither odd nor even.
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Is 0 a prime number?
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No. a prime number is a number that is divisible only by itself and 1.
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Is 1 a prime number?
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no.
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Is 2 a prime number?
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yes, 2 is the only even prime number. it is prime because it is only divisible by itself and 1.
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Are all primes positive?
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yes. theres no such thing as a negative prime or a prime fraction.
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How do we know if an integer is divisible by 3?
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by adding up the digits and seeing if its divisible by 3. for ex, 2145 = 12 which is div by 3.
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How do we know if an integer is divisible by 4?
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if the last two digits is divisible by 4. 712 = 12 = yes. by 3. so 712 is div by 4.
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How do we know if an integer is divisible by 6?
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if its div by both 2 and 3
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How do we know if an integer is div by 9?
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if the sum of its digits are div by 9
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2/5 in decimal form
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0.4
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3/5 in decimal form
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0.6
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1/5 in decimal form
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0.2
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equation for finding percent change
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(difference/original) 100
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square root of 1
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1
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square root of 2
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1.4
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square root of 3
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1.7
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