Mathematics, 12.09.2019 05:10 Lalagrl

To multiply a number by 99 sophia likes to multiply by 100 and then subtract 1 group of the factor. here is a picture of her thinking.

To multiply a number by 99 sophia likes to multiply by 100 and then subtract 1 group of the factor.

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To multiply a number by 99 sophia likes to multiply by 100 and then subtract 1 group of the factor....