Multiply by 100 and 1000

All these questions are about mentally multiplying by 100 and 1000, including decimals.

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When multiplying 2-digit numbers by 1-digit in your head usually it is easier to start with the tens.

Multiplying three digit multiples of 100 is fairly easy, but there are some addition adjustments to make on some of these.

Using mental methods to multiply decimals by 10, 100 and 1000.

Multiplying large numbers by 100 and 1,000.

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