Subtraction Within 20 (Regrouping) — Answer Key
Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1. minus
2. less
3. take
4. left
5. away
6. fewer
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 14 - 6 = 8
Break 6 into 4 and 2: first 14 - 4 = 10, then 10 - 2 = 8.
2. 11 - 3 = 8
Take 1 away to reach the ten (11 - 1 = 10), then take 2 more away to get 8.
3. 16 - 9 = 7
Since 9 + 7 = 16, the missing partner must be 7, so 16 - 9 = 7.
4. 13 - 5 = 8
Split 5 into 3 and 2: 13 - 3 = 10, then 10 - 2 = 8.
Part C: True or False?
Read each statement. Circle True or False.
1. 15 - 7 = 8
True False
This is true because 7 + 8 = 15, so 15 - 7 really does equal 8.
2. 12 - 4 = 9
True False
This is false: 12 - 4 actually equals 8, because 4 + 8 = 12, not 9.
3. 17 - 8 = 9
True False
This is true since 8 and 9 are a doubles-plus-one pair that add to 17, so 17 - 8 = 9.