6.3E Math Review

How do you multiply decimals?

• Line up the decimals

• Count how many numbers are behind each decimal and add the decimal places

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• None of the above

3.2 x 0.75 =

0.4 x 1.8 =

9.1 × 0.86 =  

• 782.6

• 78.26

• 7.826

• 7,826

How do you divide by a decimal?

• Line up the decimals

• Count how many numbers are behind each decimal and add the decimal places

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• None of the above

1.62 ÷ 0.8 =

50.85 ÷ 0.625  =

• 8.136

• 813.6

• .8136

• 81.36

How do you multiply fractions?

• Keep, Change, and Flip; simplify if needed

• Count how many numbers are behind each decimal and add the decimal places

• Change the divisor to a whole number by moving the decimal to the right. Make sure you move the dividend the same amount of places

• Multiply straight across and simplify if needed