Adding Three Numbers — Answer Key
Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1. add
2. sum
3. plus
4. total
5. three
6. count
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 1 + 1 + 1 = 3
1+1=2, then 2+1=3.
2. 2 + 2 + 2 = 6
2+2=4, then 4+2=6.
3. 3 + 1 + 2 = 6
3+1=4, then 4+2=6.
4. 1 + 4 + 2 = 7
1+4=5, then 5+2=7.
Part C: True or False?
Read each statement. Circle True or False.
1. 1 + 2 + 3 equals 6.
True False
1+2=3, then 3+3=6.
2. 2 + 2 + 1 equals 6.
True False
2+2=4, then 4+1=5, not 6.
3. 3 + 3 + 2 equals 8.
True False
3+3=6, then 6+2=8.