Grade 2 Addition: Adding Three Numbers

Worked examples

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

1. Example 1

   8 + 9 + 1 = ?

   1. Look for friendly numbers: 9 + 1 = 10, a round number. Do that pair first, so now you have 8 + 10.
   2. Add: 8 + 10 = 18.
   3. So 8 + 9 + 1 = 18.

   Answer: 18

2. Example 2

   9 + 8 + 5 = ?

   1. Work left to right: 9 + 8 = 17, so now you have 17 + 5.
   2. Add: 17 + 5 = 22.
   3. So 9 + 8 + 5 = 22.

   Answer: 22

3. Example 3

   2 + 9 + 2 = ?

   1. Work left to right: 2 + 9 = 11, so now you have 11 + 2.
   2. Add: 11 + 2 = 13.
   3. So 2 + 9 + 2 = 13.

   Answer: 13