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)

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