Let's solve the
Addition - Missing Addend (Sums up to 10) worksheet step by step.
We are given addition equations where one of the addends is missing. We need to find the missing number that, when added to the first number, gives the total (sum) on the right side.
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How to Solve:
For each problem like:
a + _ = b,
the missing addend is:
b - a
So, subtract the known addend from the sum.
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Now let’s go through each problem:
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1) 3 + _ = 4
→ 4 - 3 =
1
✔ Answer:
1
2) 4 + _ = 5
→ 5 - 4 =
1
✔ Answer:
1
3) 2 + _ = 2
→ 2 - 2 =
0
✔ Answer:
0
4) 1 + _ = 2
→ 2 - 1 =
1
✔ Answer:
1
5) 2 + _ = 9
→ 9 - 2 =
7
✔ Answer:
7
6) 1 + _ = 1
→ 1 - 1 =
0
✔ Answer:
0
7) 5 + _ = 7
→ 7 - 5 =
2
✔ Answer:
2
8) 4 + _ = 6
→ 6 - 4 =
2
✔ Answer:
2
9) 4 + _ = 8
→ 8 - 4 =
4
✔ Answer:
4
10) 3 + _ = 7
→ 7 - 3 =
4
✔ Answer:
4
11) 2 + _ = 10
→ 10 - 2 =
8
✔ Answer:
8
12) 1 + _ = 5
→ 5 - 1 =
4
✔ Answer:
4
13) 1 + _ = 6
→ 6 - 1 =
5
✔ Answer:
5
14) 2 + _ = 4
→ 4 - 2 =
2
✔ Answer:
2
15) 4 + _ = 7
→ 7 - 4 =
3
✔ Answer:
3
16) 7 + _ = 8
→ 8 - 7 =
1
✔ Answer:
1
17) 7 + _ = 10
→ 10 - 7 =
3
✔ Answer:
3
18) 1 + _ = 3
→ 3 - 1 =
2
✔ Answer:
2
19) 3 + _ = 8
→ 8 - 3 =
5
✔ Answer:
5
20) 2 + _ = 5
→ 5 - 2 =
3
✔ Answer:
3
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✔ Final Answers:
1) 1
2) 1
3) 0
4) 1
5) 7
6) 0
7) 2
8) 2
9) 4
10) 4
11) 8
12) 4
13) 5
14) 2
15) 3
16) 1
17) 3
18) 2
19) 5
20) 3
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🔍 Explanation:
This worksheet helps students understand
addition facts and
inverse operations (subtraction). By knowing that:
>
Addend + Addend = Sum,
we can rearrange it as:
>
Missing Addend = Sum - Known Addend
This builds foundational skills for mental math and algebraic thinking.
Let me know if you'd like this printed or turned into a study sheet! 😊
Parent Tip: Review the logic above to help your child master the concept of adding within 10 worksheets.
