Question

Find 3×12 using two different methods. Which method do you find more efficient?

Answer 1

Method 1)

3×12 = 3×(10+2) = 3×10 + 3×2 = 30 + 6 = 36

Method 2)

3×12 = 12+12+12 = 36

I'll let you decide which you find more efficient.