Grade 2 Number Bonds: Mixed Number Bonds

Worked examples

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

1. Example 1

   ? + 10 = 30

   1. A number bond joins two parts to make a whole. The whole is 30 and one part is 10.
   2. To find the missing part, take the known part away from the whole: 30 − 10.
   3. So the missing part is 20.

   Answer: 20

2. Example 2

   79 + 17 = ?

   1. A number bond joins two parts to make a whole. Here the two parts are 79 and 17.
   2. To find the whole, put the parts together: 79 + 17.
   3. So the whole is 96.

   Answer: 96

3. Example 3

   20 + ? = 42

   1. A number bond joins two parts to make a whole. The whole is 42 and one part is 20.
   2. To find the missing part, take the known part away from the whole: 42 − 20.
   3. So the missing part is 22.

   Answer: 22