Number Lines — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Start at 20 and take 3 jumps of 10 to the right. You land on 50.
20 plus 10 is 30, plus 10 is 40, plus 10 is 50, so the end value is 50.
2. From 40, 2 jumps of 10 to the right end at 60.
Two jumps of 10 add 20, so 40 plus 20 lands at 60.
3. Start at 15 and take 4 jumps of 10. You land on 55.
Four hops of 10 add 40, so 15 plus 40 is 55.
4. Starting at 70 and jumping 10 to the right once lands on 80.
70 plus one hop of 10 equals 80 on the number line.
5. From 10, take 5 jumps of 10 and you land on 60.
Five jumps of 10 add 50, so 10 plus 50 lands on 60.
6. Start at 25 and take 3 jumps of 10. You land on 55.
Three hops of 10 add 30, so 25 plus 30 is 55 on the line.
7. From 60, jumping 10 to the right 4 times ends at 100.
Four jumps of 10 add 40, so 60 plus 40 lands on 100.
8. Start at 5 and take 6 jumps of 10. You land on 65.
Six hops of 10 add 60, so 5 plus 60 equals 65 on the number line.
9. From 80, two jumps of 10 to the right end at 100.
Two jumps of 10 add 20, so 80 plus 20 lands on 100.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Starts at 40 and jumps 3 hops of 10
→ 70
70
Starts at 20 and jumps 2 hops of 10
→ 40
40
Starts at 55 and jumps 4 hops of 10
→ 95
95
Starts at 10 and jumps 7 hops of 10
→ 80
80
Each left item tells you the start and the number of hops of 10; add 10 per hop to find the end value.