Question

6. Leon says he can find the sum of 30 + 67 without

rewriting it. Explain how you can solve this problem
using mental math.

Answer 1

Explanation:

30+67=(30+70)-3=100-3=97

Answer 2

You can just place the 7 instead of the 0 since if you add anything to 0 it is the number you added. then 3 and 6 make 9. so it is 97.

Explanation:

30

+67

97