Let’s solve each addition problem step by step. We’re looking for the missing number that, when added to the first number, gives the total on the right.
We can find the missing number by subtracting the known number from the total.
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Left Column:
1.
2100 + ? = 6200
→ 6200 - 2100 =
4100
2.
1500 + ? = 9200
→ 9200 - 1500 =
7700
3.
2600 + ? = 3700
→ 3700 - 2600 =
1100
4.
5200 + ? = 7100
→ 7100 - 5200 =
1900
5.
2700 + ? = 4500
→ 4500 - 2700 =
1800
*(Note: The last one is cut off in the image, but we’ll do what’s visible.)*
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Right Column:
6.
? + 2900 = 8500
→ 8500 - 2900 =
5600
7.
? + 7600 = 9100
→ 9100 - 7600 =
1500
8.
? + 800 = 1500
→ 1500 - 800 =
700
9.
? + 6100 = 7700
→ 7700 - 6100 =
1600
10.
? + 7700 = 9300
→ 9300 - 7700 =
1600
*(Again, last one may be cut off — we go with what’s clear.)*
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✔ All calculations checked and verified.
Final Answer:
Left column answers (top to bottom): 4100, 7700, 1100, 1900, 1800
Right column answers (top to bottom): 5600, 1500, 700, 1600, 1600
Parent Tip: Review the logic above to help your child master the concept of addition worksheet year 4.
