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12 Cards in this Set
- Front
- Back
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How do you add decimals? |
Always line up the decimals vertically. Place a zero behind each whole number to keep track of what is being added. |
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How do you add fractions? |
Every fraction must have a common denominator. To find the lowest common denominator, simply multiply the denominators. Remember what you do to the denominator must be done to the numerator. Each side will be multiplied by the opposite number. |
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How do you add percentages? |
Simply turn the percentage into a decimal and add. Remember to line up the decimals points. |
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How do you subtract math problems with decimals? |
Line up the decimal points and subtract like any other basic subtraction problem. Keep the decimals lined up and add a zero behind each whole number to keep things lined up. |
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How do you subtract math problems with percentages? |
First turn the percentage into a decimal. Then line up the decimals and subtract. Remember to keep the decimals lined up. |
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How do you subtract math problems with fractions? |
Find the lowest common denominator by multiplying the denominators. Once that is done, subtract straight across. If the problem is a mixed number, it must be converted into an improper fraction first. |
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How do you perform multiplication? |
This is just a fast way of adding. It is taking one number and adding it to itself as many times as is asked. ex: 5x6=30 (5+5+5+5+5+5=30) |
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How do you multiply math problems that have decimals? |
Perform the multiplication as usual. Once you have the answer, simply count the numbers behind the decimals in the original problem. Then count them off from right to left. |
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How do you multiply percentages? |
Turn the percentage into a decimal and multiply. Remember to count the numbers behind all of the decimals then place the new decimal. Always count from right to left when placing decimals. |
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How do you divide fractions? |
When dividing fractions, the rule is you flip the second fraction and simply multiply straight across. |
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How do you divide percentages? |
Simply turn the percentage into a decimal and divide. Remember dividing is figuring out how many times a number will go into another number. |
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How do you divide math problems that have decimals? |
These problems will be set up in long division form. The decimal will be moved to the right side of the divider and will also be moved as many times in the number to be divided. This way you will have accurate placement of the decimal and can calculate the right answer. |
