Year 4 maths worksheet: Multiplying by 10 or 100

Remember the golden rules about multiplying:

When a number is multiplied by 10 it moves one place to the left.

When a number is multiplied by 100 it moves two places to the left. if this leaves a gap in the units or tens and units a zero must be inserted as a ‘place holder’.

Don’t get dragged into saying ‘add a nought’ because this doesn’t work with decimals eg 1.5 x 10 is not 1.50!!

This page can be found in our Year 4: Calculating section.

Multiply by 10 or 100

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