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| If a number is divisble by 2 then the last digit is divisble by? |
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| If a number is divisble by 3 then the sum of its digits is divisible by? |
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| If a number is divsible by 4 the the last two digits is divisble by? |
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| A number is divisble by 5 if the last digit are what? |
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| A number is divisble by 6 if it is divisble by what two numbers? |
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| A number is divisble 9 if the sum of its digits is divisble by what number? |
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avg= total of a/total of b
ex. avg miles per hr= total miles/hours |
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| How to change a decimal to a percent? |
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| Move decimal over two spaces |
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| How do you multiply two exponents with the same base? 2^2 * 2^3 |
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| How do you divide two exponents with the same base? 2^2 -2^3 |
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| How do you solve negative exponents? |
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| Change it to a fraction and solve for the base using the exponent |
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| For square roots you can only add and subtract |
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| To multiply and divide roots? |
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| Solve for both the outside then inside radicals |
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| avg. value * number of value |
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| number of desired outcomes/number of total possible outcomes |
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| to make a fraction a percent? |
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| To make decimal a percent? |
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| MOVE DECIMAL 2 PLACES TO THE LEFT |
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| To change a percent to a number |
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| To make a decimal percent a decimal number? |
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| move decimal to the right two places |
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common percent and fraction equivalents
1/20=
1/10=
1/8=
1/6=
1/5=
1/4=
1/3=
1/2= |
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1/20= 5%
1/10= 10%
1/8= 12 1/2%
1/6= 16 2/3%
1/5= 20%
1/4= 25%
1/3= 33 1/3%
1/2= 50% |
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Percent and fractinal equivalents?
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
12 1/2%
25%
37 1/2%
62 1/2%
75%
87 1/2%
16 2/3%
33 1/3%
66 2/3%
83 1/3% |
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10%= 1/10
20%= 2/5 1/5
30%= 3/10
40%= 4/10 2/5
50%= 5/10 4/8 2/4 3/6 1/2
60%= 6/10 3/5
70%= 7/10
80%= 8/10 4/5
90%= 9/10
100%= 10/10 1
12 1/2%= 1/8
25%= 2/8 1/4
37 1/2%= 3/8
62 1/2%= 5/8
75%= 6/8 3/4
87 1/2%= 7/8
16 2/3%= 1/6
33 1/3%= 2/6 1/3
66 2/3%= 4/6 2/3
83 1/3%= 5/6 |
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| How to determine percent increase and decrease? |
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% increase= amt. of increase/original whole (100%)
% decrease= amt. of decrease/original whole (100%) |
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| How do you multiple exponents with the same base? ex. 2^2 * 2^3 |
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| Add the exponents. ex= 2^5 |
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| How do you divide two exponents w/ the same base? 4^4 / 4^2 |
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| Subtract the exponents. ex= 4^2 |
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| To raise an exponents power to another power? ex. (3^2)^4 |
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| Simply multiply the exponents together. ex= 3^8 |
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How do you slove for negative exponents?
ex. 2^-3 |
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| change the base to a fraction over 1 and put the exponent in the bottom part of the fraction. ex- 1/2^3 |
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| How to slove for a fraction exponent? ex. 8^1/3 |
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| Make it a square root. ex= 3 sq.rt 8 |
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| How to add and subtract square roots? |
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| can't add or subtract only add and subtract numbers outside of the roots that have the same radicals. like algebra! |
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| How do you multi. and divide square roots? |
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| The same way you do FOIL. Outside numbers 1st then radicals. |
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How do you solve power of 10 exponents?
How do you mulitply them?
how do you mulitply them when neg. |
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add zeros based on the number of the exponent.
move decimals to the right based on number of exponents
move to the left based on number of exponents. |
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