How to add, subtract, and divide fractions & decimals!

By: Kelly Oren! :)

How to add decimals!

• 1. Write the two sets of numbers out, lining them up in columns. Keep the decimal points on top of each other and line up the non-decimals with non-decimals and the decimals with decimals.

• 2. Start at the right-most column and add it up. If it becomes more than 9, remember to write the next digit in a third row (perhaps in a smaller notation).

• 3. Add the second right-most column up with any extra number from the first column.

• 4. Continue the process, remembering to include extra digits from previous columns.

How to divide decimals!

• 1. Move the outside decimal all the way to the right

• 2. Move the inside decimal to the right the same number of places as the outside decimal was moved

• 3. Raise the inside decimal straight up• 4. Divide

How to multiply decimals!

- Multiply normally, ignoring the decimal points. - Then put the decimal point in the answer - it

will have as many decimal places as the two original numbers combined.

How to subtract decimals!

• Write down the two numbers, one under the other, with the decimal points lined up.

• Add zeros so the numbers have the same length

• Then subtract normally, remembering to put the decimal point in the answer

• Simplify the fraction (if needed)

How to divide fractions!

• Turn the second fraction (the one you want to divide by) upside-down (this is now a reciprocal).

• Multiply the first fraction by that reciprocal

How to add fractions!

• Make sure the bottom numbers (the denominators) are the same

• Add the top numbers (the numerators). Put the answer over the same denominator.

• Simplify the fraction (if needed).

How to subtract fractions!

• Make sure the bottom numbers (the denominators) are the same

• Subtract the top numbers (the numerators). Put the answer over the the same denominator.

• Simplify the fraction.

How to multiply fractions!

• Multiply the top numbers (the numerators).• Multiply the bottom numbers (the

denominators).• Simplify the fraction if needed.

THE END! :D