Explaining Fractions And Decimals By : John Corbett

Fractions Add Subtract Multiply Divide

+ Adding 1. Add the numerators 4/8 +3/8 4+3=7 4/8 +3/8 4+3=7 2. Keep the denominators the same 4/8+3/8= 7/8 +

- Subtracting Subtract the numerators 4/5- 3/5=1 2. Keep the denominators the same 4/5-3/5=1/5 -

x Multiplying Multiply the numerators. 5/7x3/7=15 2. Multiply the denominators. 5/7x3/7=15/49 3. Simplify if needed x

÷ Dividing 1. Flip the last fraction 2/3÷3/4 2/3x4/3 2. Change the ÷ to a x sign 3. Now multiply and you get… 2/3x4/3=8/9 ÷

Decimals Add Subtract Multiply Divide (long division)

+ Adding Line your decimals up 12.65 Add 16.90 + 4.35 Add 16.90 Remember to bring down your decimal +

- Subtracting Line your decimals up 20.65 Subtract -18.65 2.00 3. Remember to bring down your decimal -

x Multiplying 360 now becomes 3.60 Multiply the 2 numbers disregarding the decimals 2.4 x 2.5 120 +240 360 Now, move the decimal in your new number, over by the same number of digits as are on the numbers you multiplied 360 now becomes 3.60 x

Dividing (long division) 9.1 ÷ 7 2. Set your problem up for long division 3. Move the decimal straight up and divide normally 1.3 7)9.1 -7 21 -21 ÷