grade 3 · MT-003

Use a related fact

Use commutative and inverse relationships instead of isolated memorization.

Learn togetherFresh problem · seed 826365860

Use 2 × 10 = 20. What is 10 × 2?

Let's work it out together.

Work through one checkpoint at a time. Your answer area opens after the reasoning.

Checkpoint 1

Keep the same two factors.
Checkpoint 2

The commutative property lets multiplication factors switch order.
Checkpoint 3

The product stays the same when 2 × 10 becomes 10 × 2.

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