Number Line Addition & Subtraction — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Start at 5. Jump forward 4, then forward 3. Land on 12
After both forward jumps, you land on 12.
2. Start at 15. Jump back 4, then back 2. Land on 9
After both backward jumps, you land on 9.
3. Start at 8. Jump forward 5, then back 2. Land on 11
Forward 5 and back 2 from 8 lands on 11.
4. Start at 12. Jump back 3, then forward 6. Land on 15
Back 3 and forward 6 from 12 lands on 15.
5. Start at 6. Jump forward 7, then forward 2. Land on 15
Two forward jump sets from 6 reach 15.
6. Start at 19. Jump back 5, then back 3. Land on 11
Two backward jump sets from 19 reach 11.
7. Start at 10. Jump forward 4, then back 6. Land on 8
Forward 4 and back 6 from 10 lands on 8.
8. Start at 14. Jump back 8, then forward 5. Land on 11
Back 8 and forward 5 from 14 lands on 11.
9. Start at 3. Jump forward 9, then back 4. Land on 8
Forward 9 and back 4 from 3 lands on 8.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Sam had 7, got 5 more
→ 7+5=12
7+5=12
Ana had 12, gave 4
→ 12-4=8
12-4=8
Jay started at 9, added 6
→ 9+6=15
9+6=15
Mia had 15, lost 7
→ 15-7=8
15-7=8
Gaining maps to addition; losing maps to subtraction in number line stories.