A second medium sheet that uses number lines to dig deeper into missing addends and sums. Part A presents nine fill-in-the-missing-number problems, including count-on prompts starting from 8 and 5, plus equations like 4 + ___ = 13. Part B is a matching activity pairing four addition problems such as 6 + 9 and 13 + 7 with their sums. First graders practice flexibility and accuracy with sums right up to twenty.
Style:
Addition Within 20
Part A: Fill in the Missing Number
Use the number line to find the missing number. Write it on the line.
1. Start at 8. Count on 6 more. You land on 14.
2. Start at 5. Count on 7 more. You land on 12.
3. 4 + 9 = 13
4. 9 + 7 = 16
5. 8 + 12 = 20
6. 9 + 5 = 14
7. 10 + 7 = 17
8. 3 + 8 = 11
9. 9 + 6 = 15
Part B: Match the Problem to Its Sum
Draw a line from each addition problem to its correct sum.
1. Match each addition problem to its sum.
6 + 9
→ 15
20
7 + 4
→ 11
15
11 + 5
→ 16
16
13 + 7
→ 20
11
Addition Within 20
★ Part A: Fill in the Missing Number
Use the number line to find the missing number. Write it on the line.
1) Start at 8. Count on 6 more. You land on 14.
2) Start at 5. Count on 7 more. You land on 12.
3) 4 + 9 = 13
4) 9 + 7 = 16
5) 8 + 12 = 20
6) 9 + 5 = 14
7) 10 + 7 = 17
8) 3 + 8 = 11
9) 9 + 6 = 15
★ Part B: Match the Problem to Its Sum
Draw a line from each addition problem to its correct sum.
1) Match each addition problem to its sum.
6 + 9
→ 15
20
7 + 4
→ 11
15
11 + 5
→ 16
16
13 + 7
→ 20
11
Ready to Practice?
For Part A, write the missing number. For Part B, draw a line to match each problem to its sum.
10 Questions
15-20 minutes
Auto-graded
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