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Adding One-Digit Numbers (< 5) 2

Directions: Use the digits 1 to 5, at most one time each, to fill in the boxes to create a true number sentences with the greatest possible sum.

Hint

Hint

What is the largest sum you could have?
What are the largest addends you could use?
What’s an example of numbers you couldn’t use? (such as 3 + 4 = 7)

Answer

Answer

Because the digits are limited to 1 to 5, the largest sum you could make is 5. That results in:

1 + 4 = 5
4 + 1 = 5
3 + 2 = 5
2 + 3 = 5

This gives you an opportunity to talk about the commutative property of addition (for example: 1 + 4 = 4 + 1) and how there are bigger sums if you use digits beyond 1 to 5.

Source: Robert Kaplinsky

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