Question

Describe the error in the work shown below.
18 + 30 = 6(3 + 10)

Answer 1

18+30 = 48

6(3+10) = 78

so they're not equal

Explanation:

to be equal we have to change 6(3+10) to 6(3+5)

18+30 = 48

6(3+5) = 48

now they're equal