Number Line Addition & Subtraction — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. 10 + 5 on a number line: 15
Ten plus five jumps forward lands on 15.
2. 14 - 6 on a number line: 8
Fourteen minus six jumps back lands on 8.
3. Start at 7. Jump forward 8. Land on 15
Seven plus eight forward jumps reach 15.
4. Start at 18. Jump back 9. Land on 9
Eighteen minus nine back jumps land on 9.
5. 12 + 7 on a number line: 19
Twelve plus seven forward jumps reach 19.
6. 20 - 8 on a number line: 12
Twenty minus eight back jumps land on 12.
7. Start at 5. Jump forward 9. Land on 14
Five plus nine forward jumps reach 14.
8. Start at 16. Jump back 7. Land on 9
Sixteen minus seven back jumps land on 9.
9. 11 + 6 on a number line: 17
Eleven plus six forward jumps reach 17.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
9 + 4
→ forward a little
forward a little
13 - 5
→ backward a lot
backward a lot
Add 6 to 10
→ forward by six
forward by six
Subtract 3 from 15
→ backward by three
backward by three
Plus signs mean forward jumps; minus signs mean backward jumps on a number line.