Question

Alvin incorrectly simplified 4 x 42 and got an answer of 166.

What did Alvin do wrong? Explain and then solve the
problem correctly.

Answer 1

the answer is 168

Explanation:

you times 4 by 2 you get 8.

now you got to times 4 by 40 and you get 160

now you add 8 to 160 you will get 168