This medium sheet shifts the focus to missing addends and matching. Part A gives nine fill-in-the-missing-number problems mixing 'start at 7, count on 5' style prompts with traditional equations like 6 + ___ = 14. Part B is a matching activity where first graders pair four addition problems such as 7 + 6 and 8 + 8 with their correct sums.
Together these challenge kids to think flexibly about parts and totals within 20.
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 7. Count on 5 more. You land on 12.
2. Start at 9. Count on 4 more. You land on 13.
3. 6 + 8 = 14
4. 7 + 8 = 15
5. 9 + 8 = 17
6. 7 + 6 = 13
7. 10 + 8 = 18
8. 5 + 7 = 12
9. 7 + 9 = 16
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.
7 + 6
→ 13
16
9 + 5
→ 14
14
8 + 8
→ 16
13
12 + 6
→ 18
18
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 7. Count on 5 more. You land on 12.
2) Start at 9. Count on 4 more. You land on 13.
3) 6 + 8 = 14
4) 7 + 8 = 15
5) 9 + 8 = 17
6) 7 + 6 = 13
7) 10 + 8 = 18
8) 5 + 7 = 12
9) 7 + 9 = 16
★ 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.
7 + 6
→ 13
16
9 + 5
→ 14
14
8 + 8
→ 16
13
12 + 6
→ 18
18
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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