Question

What are the steps for using integer tiles to evaluate the expression 45 - 15?

a) Start with 15 tiles and separate them into 3 same-sized groups.
b) Start with 45 tiles and separate them into 15 same-sized groups.
c) Assemble 45 groups of 3 tiles each.
d) Assemble 45 groups of 15 tiles each.

Answer 1

To evaluate the expression 45 - 15 using integer tiles, start with 45 tiles and separate 15 tiles from them. The remaining tiles will represent the answer, which is 30.

Step-by-step explanation:

The correct steps for using integer tiles to evaluate the expression 45 - 15 are:

1. Start with 45 tiles representing the number 45.
2. Separate 15 tiles from the original 45 tiles.
3. Count how many tiles are left after separating 15 tiles. In this case, you would have 30 tiles.

So, the result of 45 - 15 using integer tiles is 30.