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Using Models to Understand Addition

Adding 9 ones and 5 ones will give us ____ ones.

Trade in 10 ones pieces for a _____ piece.

We have a total of 13 tens.

Trade in 10 tens pieces for a hundreds piece.

The sum 1 hundred, 3 tens, and _____ ones.

Or we could write it out as _____

1 answer

Let's break this down step by step using models to understand addition:

  1. Adding 9 ones and 5 ones will give us 14 ones.

  2. Trade in 10 ones pieces for a ten piece.

  3. We have a total of 13 tens, which means we have 130 (because 13 tens equals 130).

  4. Trade in 10 tens pieces for a hundred piece.

  5. The sum of 1 hundred, 3 tens, and 4 ones will give us 134 (because 1 hundred is 100, 3 tens is 30, and 4 ones is 4).

  6. Or we could write it out as 1 hundred + 3 tens + 4 ones = 134.

With this understanding, we can see how models help visualize and simplify addition problems!