Arithmetic Grade Two

Lesson One hundred forty-three: Grid Multiplication

We can represent multiplication problems with pictures:

3 x 4 = 12

The picture shows a large rectangle three cubes tall and four cubes wide. If you count all the cubes you will find that there are 12 of them.

Here's another example:

5 x 3 = 15

The picture shows a large rectangle five cubes tall and three cubes wide. If you count all the cubes you will find that there are 15 of them.

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