Question

How can you use the properties of operations to evaluate this expression?
18 + 4(28). Explain.

Answer 1

Use the distributive property and expand 28, then distribute the 4 to 20 and the 4 to 8. Then you have 18 + 80 + 32. Use commutative property to reverse the order of 32 and 80 so that 18 and 32 are friendly numbers to add.

Answer 2

130.

Explanation:

18 + 4(28(

= 18 + 4 * 28 Multiplication is done before addition so we have:

18 + 112

= 130.