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31 Cards in this Set
- Front
- Back
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32 - 478
What do you have to do? |
Put the bigger number on top
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12.785 + 3.2 + 187.33
What do you have to do? |
Line up the decimal places
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155.2 x 3.4
What do you have to do? |
Multiply like normal and put two decimal places in the answer
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45 divided by .34
What do you have to do? |
Work the division with .34 on the outside and 45 on the inside.
Get rid of the decimal on the outside by moving it two places so it's 4500 divided by 34 |
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-32 + 5
What do you have to do? |
They are opposites, so subtract the little number from the big number and use the sign from the bigger number
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(-5) x (-32) or -5 divided by -32
What do you have to do? |
Two negatives make a positive
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(-5) x (32)
What do you have to do? |
Positive times or divided by negative makes a negative
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Change 3/5 into a decimal
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Do the division with 5 on outside, 3 on inside
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Change .6 into a fraction
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Put the 6 over a 10. Simplify if necessary.
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Change .6 to a percent
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move decimal over two places to the right and add percent sign
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Change 45.3% to decimal
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Move decimal to places to the left and drop the percent sign
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Change 45% to a fraction
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Drop the percent sign and put the number over 100 (always over 100).
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Simplify/Reduce 24/36
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Look for a common number you can use to divide the top and the bottom. Repeat until not possible anymore.
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Change 4 1/5 to a regular fraction.
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Multiply the bottom times the whole number, then add the top.
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Change 21/5 into a mixed number like 4 1/5
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Divide the 5 into the 21. Stop before the answer gives decimals and put the remainder over the 5. I.e. 5 goes into 21 4 times with one left over, so it's 4 1/5.
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What to do with 5(3x+2)?
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Multiply the number outside the parentheses by each term inside.
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What to do with 4x - (2x -3y+4)
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The minus gets applied to each term inside the parentheses, which flips each term: 4x - 2x + 3y - 4
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How to solve a simple equation: 6x +5 = 2x +3
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1. Collect all the x-terms on one side. 2. Collect all the numbers on the other side.
3. Use division to get the x alone. |
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How to solve an inequality: -5x > 15
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Just like an equation except that when you divide by the -5 you have to flip the sign: x < -3
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If x is raised to the 2-power and then the whole thing is raised to the 3-power?
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Multiply the powers: It's x to the 6-power.
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3x raised to the 2-power, then all of it raised to the 3-power?
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1. For the numbers, Raise the 3 to the 2-power, then raise it to the 3-power = 3x3 x 3x3 x 3x3
2. For the x's multiply the powers: x to the 6-power 3. Answer is 729 times x to the six-power |
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x to the 2-power times x to the 3-power?
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Add the exponents: x to the 5-power
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x to the 7-power divided by x to the 4-power?
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Subtract the exponents: x to the 3-power
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what is another way to say x to the one-half-power?
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square root of x
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if you have a right triangle, what formula lets you figure out the lengths of the sides?
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a-squared plus b-squared = c-squared, where c is the longest side.
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What does |x| mean? What is |-4|?
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It means to drop any negative sign if there is one. |-4| is 4. |4| is also 4.
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What is square root of 49?
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Could be 7 OR -7
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What is square root of -49?
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Impossible - no answer
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What is cube root of -8?
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-2 only
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What is square root of 5 times square root of 3?
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Just multiply the numbers together and put a squareroot over them: square root of 15.
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What is square root of 3 plus square root of 5?
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Impossible to combine these. Leave them the way you found them.
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