Multiplying and dividing decimal numbers

Divide:

 $4.2\ \div\ .7$  

• 7

• .7

• .07

When you divide 0.50505 by 0.0005, you start by moving the decimal in the divisor to the ...

• right four places

• right five places

• left four places

• right five places

• 0.051

• 5.1

• 51

• 0.0051

• 469.875 ft³

• 375.225 ft³

• 407.225 ft³

• 418.502 ft³

76.2 ÷ 18.4 =

• 3
• 7
• 6
• 4

42  $\div$  .6 = 

• 7

• 70

• .7

• .07

When you multiply numbers with decimals, do you line up the decimals?

• Yes, lining up the decimals will give you the accurate answer.

• Yes, lining up the decimals makes the equation look nicer.

• No, the decimals only line up in word problems.

• No, decimals only need to be lined up for add/ subtraction equation NOT multiplication.

Answer explanation

When multiplying numbers the decimals do not need to line up. Once all your multiplication is done you will count how many decimal places you will ned to move at the end.

If you multiply 7.3 by 2.52, how many numbers would be behind the decimal point in the product?

• 2
• 3
• 4
• 5

9.6 ÷ 0.8

• 12
• 1.2
• 7.68
• 0.768

2.58÷3=

• 0.86

• 8.6

• 86

• 0.76