3-9 Dividing Decimals

1) Move decimal on the outside to the right making 1) Move decimal on the outside to the right making this number a whole number 2) Move the decimal on the inside the same number of spaces 3) Bring up your decimal to your answer 4) Divide like normal

We'll model the first problem together We'll model the first problem 
together. Write down the 
problem next to one set of 
tenths grids. 2.8 ÷ 0.7

2.8 ÷ 0.7 Color the first number.

2.8 ÷ 0.7 Break the first number down into groups. Each 
group should be as large as the second number

2.8 ÷ 0.7 Describe the number of groups in the grid.

Model the following problems. 1.) 2.4 ÷ 0.3 = 2.) 2.5 ÷ 0.5 = 3.) 3.2 ÷ 0.8 = 4.) 2.6 ÷ 0.2 =

Below are more problems with their solutions Below are more problems with their 
solutions. Look for connections between 
the numbers. 5.) 1.2 ÷ 0.03 = 40 7.) 0.045 ÷ 0.9 = 0.05 6.) 2.8 ÷ 4 = 0.7 8.) 0.56 ÷ 0.7 = 0.8

Finally look at the family of facts below. .3 30 9.) 5 1.5 10.) .5 15 3 .3 11.) .5 1.5 12.) .5 .15 300 3 13.) .05 15 14.) .05 .15

Questions to ponder. 7.) What do you notice about the 
numbers involved with these division 
problems? 8.) How will we know where to place our 
decimal point in our solution?

1-9 Dividing Decimals Examples: 1.) 0.32 ÷ 2 2.) 2.7 ÷ 0.5

1-9 Dividing Decimals Examples: 3.) 5.2 ÷ 0.03 4.) 0.76 ÷ 0.4

1-9 Dividing Decimals Examples: 1.) 0.32 ÷ 2 2.) 2.7 ÷ 0.5