Using doubling or halving to calculate efficiently | Starter Quiz | Oak National Academy

What is the commutative law in multiplication?

• If you change the order of factors and the product will change too.

• You can change the order of factors and the product will be the same.

What is the associative law in multiplication?

• You can multiply more than two factors in any order and the product will be the same.

• You can multiply three factors in a certain order.

• You should not multiply more than two factors.

Which law do you use when multiplying 2 x 5 x 6?

• associative law

• commutative law

When multiplying 6 x 2 x 5, which is the most efficient order?

• Multiply 2 by 5 then multiply 10 by 6

• Multiply 6 by 5 then double

• Multiply 6 x 2 then multiply 12 by 5

8 x 4 x 10 = 4 x 10 x 8. True or false?

• False

• True