Multiplying by Multiples of 10
8th Grade · Math · 45 min
Lesson Preview
Learning Objective
I can multiply multi-digit numbers by multiples of 10 using mental math and estimation strategies.
- 1
One way to solve 3 × 60 is to think of it as 60 + 60 + 60, which equals 180.
- 2
Since 60 is the same as 6 × 10, 3 × 60 can be solved as 3 × 6 × 10, which equals 18 × 10, or 180.
- 3
To solve 50 × 7, you can multiply 5 × 7 to get 35, then multiply by 10 (or add a zero) to get 350.
