Addition Within 20 — Answer Key
Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1. plus
2. sum
3. add
4. total
5. equal
6. more
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 9 + 3 = 12
Make a ten: 9 + 1 = 10, then 10 + 2 = 12.
2. 8 + 5 = 13
Make a ten: 8 + 2 = 10, then 10 + 3 = 13.
3. 7 + 4 = 11
Make a ten: 7 + 3 = 10, then 10 + 1 = 11.
4. 6 + 8 = 14
Make a ten: 8 + 2 = 10, then 10 + 4 = 14.
Part C: True or False?
Read each statement. Circle True or False.
1. 5 + 6 = 11
True False
True. 5 + 6 does equal 11. You can count on 6 from 5 to check.
2. 9 + 4 = 12
True False
False. 9 + 4 = 13, not 12. Count on 4 from 9 to see.
3. 8 + 7 = 15
True False
True. 8 + 7 does equal 15. You can count on 7 from 8 to check.