To solve the addition problems in the worksheet, we need to determine the missing number in each equation. The general approach is to subtract the known number from the total sum to find the missing number. Let's solve each problem step by step.
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Left Column:
1.
41 + ☐ = 69
- Missing number = \( 69 - 41 = 28 \)
- Answer:
28
2.
70 + ☐ = 72
- Missing number = \( 72 - 70 = 2 \)
- Answer:
2
3.
22 + ☐ = 62
- Missing number = \( 62 - 22 = 40 \)
- Answer:
40
4.
27 + ☐ = 35
- Missing number = \( 35 - 27 = 8 \)
- Answer:
8
5.
09 + ☐ = 31
- Missing number = \( 31 - 9 = 22 \)
- Answer:
22
6.
30 + ☐ = 64
- Missing number = \( 64 - 30 = 34 \)
- Answer:
34
7.
00 + ☐ = 19
- Missing number = \( 19 - 0 = 19 \)
- Answer:
19
8.
35 + ☐ = 63
- Missing number = \( 63 - 35 = 28 \)
- Answer:
28
9.
17 + ☐ = 23
- Missing number = \( 23 - 17 = 6 \)
- Answer:
6
10.
22 + ☐ = 46
- Missing number = \( 46 - 22 = 24 \)
- Answer:
24
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Right Column:
11.
10 + ☐ = 13
- Missing number = \( 13 - 10 = 3 \)
- Answer:
3
12.
50 + ☐ = 24
- Missing number = \( 24 - 50 = -26 \)
- Answer:
-26
13.
00 + ☐ = 35
- Missing number = \( 35 - 0 = 35 \)
- Answer:
35
14.
48 + ☐ = 49
- Missing number = \( 49 - 48 = 1 \)
- Answer:
1
15.
52 + ☐ = 58
- Missing number = \( 58 - 52 = 6 \)
- Answer:
6
16.
29 + ☐ = 29
- Missing number = \( 29 - 29 = 0 \)
- Answer:
0
17.
30 + ☐ = 51
- Missing number = \( 51 - 30 = 21 \)
- Answer:
21
18.
70 + ☐ = 84
- Missing number = \( 84 - 70 = 14 \)
- Answer:
14
19.
21 + ☐ = 27
- Missing number = \( 27 - 21 = 6 \)
- Answer:
6
20.
52 + ☐ = 80
- Missing number = \( 80 - 52 = 28 \)
- Answer:
28
---
Final Answers:
1.
28
2.
2
3.
40
4.
8
5.
22
6.
34
7.
19
8.
28
9.
6
10.
24
11.
3
12.
-26
13.
35
14.
1
15.
6
16.
0
17.
21
18.
14
19.
6
20.
28
---
Boxed Final Answer:
\[
\boxed{28, 2, 40, 8, 22, 34, 19, 28, 6, 24, 3, -26, 35, 1, 6, 0, 21, 14, 6, 28}
\]
Parent Tip: Review the logic above to help your child master the concept of 4 grade math worksheets.
