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Activity: Classifying mental multiplications

Given below are some samples of informal methods of multiplication carried out by children. Some of them are done entirely mentally, others are partially or fully written. However the steps have been written down for clarity of the readers.

Look at the following examples and classify each according to the method used. Select from the list on the right.

Click on the linked 'comments' to check your answers.

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	Classifications
	Front end multiplication (left to right)
	Multiplication in stages (using factors)
	Multiplication by rounding (using distributive property)
	Multiplication by halving and doubling (moving factors)
	Miscellaneous methods