 # Decimals: Multiplying by 100

In this worksheet, students multiply numbers by 100 by shifting digits two places to the left in a grid. Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Decimals

Difficulty level:   ### 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. 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 100 538
• Question 2

Work out:

5.07 x 100 507
• Question 3

Work out:

6.9 x 100 690
• Question 4

Work out:

12.35 x 100 1235
• Question 5

Work out:

10.3 x 100 1030
• Question 6

Work out:

1.752 x 100 175.2
• Question 7

Work out:

10.123 x 100 1012.3
• Question 8

Work out:

0.123 x 100 12.3
• Question 9

Work out:

42.3 x 100 4230
• Question 10

Work out:

0.03 x 10 0.3
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