Grade 3 Mental Math: Multiplication Patterns

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   2 × 90 = ?

   1. 90 is 9 tens, so 90 × 2 is 9 × 2 = 18 tens.
   2. 18 tens = 180, so 90 × 2 = 180

   Answer: 180

2. Example 2

   4 × 50 = ?

   1. 50 is 5 tens, so 50 × 4 is 5 × 4 = 20 tens.
   2. 20 tens = 200, so 50 × 4 = 200

   Answer: 200

3. Example 3

   100 × 6 = ?

   1. 100 is 1 hundred, so 100 × 6 is 1 × 6 = 6 hundreds.
   2. 6 hundreds = 600, so 100 × 6 = 600

   Answer: 600