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Recall multiplication facts for 10

Multiplication by 10 represents equal groups of ten, so the facts 10×010\times 0 through 10×1010\times 10 produce the multiples 0,10,20,…,1000, 10, 20,\ldots,100; each product has zero in the ones place, reflecting its place-value structure. The related forms 10×n10\times n and n×10n\times10 express the same product through the commutative property and support later work with place value and multi-digit multiplication, without extending to generalized rules for multiplying larger numbers by 10.

Detailed Explanation: Recall multiplication facts for 10

Multiplying by 1010 means making equal groups of 1010.

For example, solve:

10×610 \times 6
  1. The 66 tells us there are 66 groups.
  2. Each group has 1010 objects.
  3. Count by tens:
10, 20, 30, 40, 50, 6010,\ 20,\ 30,\ 40,\ 50,\ 60

So,

10×6=6010 \times 6 = 60

The answer is a multiple of 1010, so it has 00 in the ones place.

You can also write the same fact in the other order:

6×10=606 \times 10 = 60

Both multiplication facts have the same product.

Learn by doing: Recall multiplication facts for 10

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