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Decimals: Multiplying by 100

In this worksheet, students multiply numbers by 100 by shifting digits two places to the left in a grid.

'Decimals: Multiplying by 100' worksheet

Key stage:  KS 2

Curriculum topic:  Number: Multiplication and Division

Curriculum subtopic:  Multiply/Divide Using Decimals

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

When we multiply numbers by 100, we do not simply add 00 to the end.

When the numbers are decimals, this rule does not work.

54.6 × 100 does not equal 54.600

 

When we multiply numbers by 100, each digit must move two places to the left.  

 

When we look at the columns in a Th, H, T, U grid we notice that Thousands are 100 times bigger than Tens, Hundreds are 100 times bigger than units, Tens are 100 times bigger than tenths etc...

 

 

Example

Work out

54.6 × 10 = 5460 

 

Here is 54.6 in a Th, H, T, U grid.

 

 

Answer

Watch this animation to see how each digit moves two places to the left.

Remember to fill in that 0 in the units column.

 

So  54.6 × 100 = 5460

Work out:

5.38 x 100

Work out:

5.07 x 100

Work out:

6.9 x 100

Work out:

12.35 x 100

Work out:

10.3 x 100

Work out:

1.752 x 100

Work out:

10.123 x 100

Work out:

0.123 x 100

Work out:

42.3 x 100

Work out:

0.03 x 10

  • Question 1

Work out:

5.38 x 100

CORRECT ANSWER
538
  • Question 2

Work out:

5.07 x 100

CORRECT ANSWER
507
  • Question 3

Work out:

6.9 x 100

CORRECT ANSWER
690
  • Question 4

Work out:

12.35 x 100

CORRECT ANSWER
1235
  • Question 5

Work out:

10.3 x 100

CORRECT ANSWER
1030
  • Question 6

Work out:

1.752 x 100

CORRECT ANSWER
175.2
  • Question 7

Work out:

10.123 x 100

CORRECT ANSWER
1012.3
  • Question 8

Work out:

0.123 x 100

CORRECT ANSWER
12.3
  • Question 9

Work out:

42.3 x 100

CORRECT ANSWER
4230
  • Question 10

Work out:

0.03 x 10

CORRECT ANSWER
0.3
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