Skill 17A
Adding Three Numbers

Add to find the sums.

First, add the doubles or two numbers that make a ten.

Next, add that sum to the last number.

Point to the correct answer or point to the question mark if you are not sure.

4

3

+ 4

  a.  11

7

2

+ 3

  a.  11
  b.  13   b.  13
  c.  9   c.  9
  d. ?   d. ?