# Repeated Addition or Multiplication of Decimals by a Whole Number

In this worksheet, students multiply decimals by whole numbers. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Four Operations for All Numbers

Difficulty level:   ### QUESTION 1 of 10

In this worksheet, you must multiply decimal numbers by a whole number.

Example:

Here are two methods for working out 4 lots of 1.64.

Find four lots of 1.64.
Here we add 1.64 four times.
1.64
1.64
1.64
1.64

Here we multiply 1.64 by 4.

Remember, multiply 164 by 4

 164 4 x 400 4 x 100 240 4 x 60 16 4 x 4 656

Answer: 656 ÷ 100 = 6.56.

Your two answers should be the same, but it is quicker to multiply when using larger numbers.

8 lots of 5.2 =
 ?
8 lots of 1.95 =
 ?
9 lots of 9.1 =
 ?
9 lots of 9.37 =
 ?
10 lots of 8.9 =
 ?
10 lots of 2.24 =
 ?
10 lots of 3.2 =
 ?
10 lots of 4.63 =
 ?
7 lots of 7.2 =
 ?
5 lots of 16.2 =
 ?
• Question 1
8 lots of 5.2 =
 ?
41.6
• Question 2
8 lots of 1.95 =
 ?
15.6
15.60
• Question 3
9 lots of 9.1 =
 ?
81.9
• Question 4
9 lots of 9.37 =
 ?
84.33
• Question 5
10 lots of 8.9 =
 ?
89
• Question 6
10 lots of 2.24 =
 ?
22.4
• Question 7
10 lots of 3.2 =
 ?
32
• Question 8
10 lots of 4.63 =
 ?
46.3
• Question 9
7 lots of 7.2 =
 ?
50.4
• Question 10
5 lots of 16.2 =
 ? 