By Jamie

Addition and Subtraction


Adding and subtractions can be easy once you know what to do. These notes will tell you more about how to add and subtract fractions.


Step 1: For a problem like 5/7 + 2/7 = ? since its denominator is 7, just add the 5 and 2, so the answer would be 7/7.


Step 1: For a problem like 5/6+3/4 you first find the least common denometer, which is 12.

Step 2: Change the problem now. Since you multiplied 6 by 2 and 4 by 3 you have to multiply the numerators.

Step 3: the new equation is 10/12 + 9/12 = 19/12* You can simplfy it to a mixed number if you want*. Subtraction is exactly the same thing but just subtract the numerators.

Multiplying Fractions

Multiplying fractions in my opinion is the easiest of the fractions.

Step 1. For a problem like 1/5 x 3/7. You just multiply both numerators and denometers.

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Dividing Fractions

Dividing fractions is basically like multiplying.

Step 1: Problem- 5/7 divided by 3/4. Flip the second fraction(3/4) to 4/3. Then change the division to multiplation. Then multiply as usually. The answer is 20/21

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Multiplying Decimals

Step 1- Line up the last digit, not the decimal.

Step 2- Count how many digits are from the last one to the decimal on each number. remember it!

Step 3- Multiply as normal.

Step 4- Once you are done, put the decimal how many you did on Step 2.

Ta- Daaa! You multiplied fractions.

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Dividing Decimals

Step 1- Move the decimals in the divisor the right to make it a whole number.

Step 2- Do the same to the dividend.

Step 3- Move the decimal up to the top.

Step 4- Divide like normal.

Yay you divided decimals!!!

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