Arithmetic Grade Two

Lesson One hundred forty-three: Grid Multiplication

We can represent multiplication problems with pictures:

2 x 5 = (10)

The picture shows a large rectangle two cubes tall and five cubes wide. If you count all the cubes you will find that there are 10 of them.

Here's another example:

3 x 3 = (9)

The picture shows a large rectangle three cubes tall and three cubes wide. If you count all the cubes you will find that there are 9 of them.

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