You've learned how to solve division problems that have a decimal point in the divisor (the number you're dividing by) only. Now you'll practice adding zeros in the divisor as placeholders.

Here's a multiplication problem. The answer has two digits.

math problem

The answer must have the same number of decimal places as the two numbers we multiply. Here, the first number has three decimal places, and the second number has two. Our answer should have five decimal places. To fill these empty slots, we must use zeros. We will add three of them.

math problem

You'll do the same thing with other division problems.

Here's 4 tenths divided by 80. 

math problem

You can add zeros to 4 tenths without changing the value.

math problem

Now write the decimal point in the answer and divide.

math problem

Because 80 doesn't go into 4, write a zero above the 4.

 

math problem

 

We know 80 doesn't go into 40, either, so write a zero above the last digit of 40.

math problem

 

But 80 does go into 400. It goes in 5 times. So write 5 above the last digit of 400.

 

math problem

Remember, a decimal number must have zeros in these empty spaces.