In this worksheet, we will learn how to multiply a decimal number by a single digit number.
Example 1
Work out:
3.8 × 7
Answer 1
If we multiply 3.8 by 10, we get 38.
38 is a whole number, which is good.
Now work out 38 × 7 = 266.
Then divide 266 by 10 to 'cancel out' the fact that we multiplied by 10 earlier.
This gives the answer 266 ÷ 10 = 26.6.
Example 2
Work out:
3.87 × 7
Answer 2
If we multiply 3.87 by 100, we get 387.
387 is a whole number, which is good.
Now work out 387 × 7 = 2709.
Then divide 2709 by 100 to 'cancel out' the fact that we multiplied by 100 earlier.
This gives the answer 2709 ÷ 100 = 27.09.