Learning Target: I can divide a decimal by a whole number.

Divide Decimals by Whole Numbers

Example

Find 4.2 ÷ 7.

Step 1:  Set up the problem.  Write the decimal point on the quotient line directly above the decimal point in the dividend.

         

 

 

 

Step 2:  Divide as if the decimal point were not there.  Think of how many times 7 goes into 42.

Step 3:  Check for reasonableness.

Understand, that your answer will reflect that you are really dividing 7 into 4.2.  Seven will not fit into 4.2 even one time.  The answer will be less than one.  The answer 0.6 makes sense.    

 4.2 ÷ 7 = 0.6

Let's Practice Together

Divide and check.

1.   1.68 ÷ 8

2.   7.5 ÷ 5

3.   0.012 ÷ 6

Your Turn

4.   3.22 ÷ 7

5.   21.06 ÷ 9

6.   18.2 ÷ 7

7.   6.01 ÷ 2

8.   0.56 ÷ 8

9.   5.75 ÷ 5

10.   25.92 ÷ 4

Check for Understanding

1.  A sailboat travels 24.9 miles in 3 hours. What is the average speed in miles per hour?

Answers

1.  0.21

2.  1.5

3.  0.002

4.  0.46

5.  2.34

6.  2.6

7.  3.005

8.  0.07

9.  1.15

10.  6.48

Check for Understanding

1.  8.3