Adding numbers worksheet with exercises and answer spaces.

Let’s solve each addition problem step by step. We’ll add the two numbers in each row and write the answer between the lines (which means just write the sum below or next to it — we’ll list all answers clearly).

We’ll go row by row, left to right.

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First set (top 3 problems):

1. 35 + 17
→ 30 + 10 = 40; 5 + 7 = 12 → 40 + 12 = 52

2. 16 + 17
→ 10 + 10 = 20; 6 + 7 = 13 → 20 + 13 = 33

3. 24 + 16
→ 20 + 10 = 30; 4 + 6 = 10 → 30 + 10 = 40

*(These match the example answers shown: 52, 33, 40 — good!)*

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Next section: Write the answer between the lines.

Row 1:
- 12 + 13 → 10+10=20, 2+3=5 → 25
- 12 + 11 → 10+10=20, 2+1=3 → 23
- 15 + 13 → 10+10=20, 5+3=8 → 28
- 12 + 12 → 10+10=20, 2+2=4 → 24
- 18 + 11 → 10+10=20, 8+1=9 → 29

Row 2:
- 17 + 20 → 10+20=30, 7+0=7 → 37
- 19 + 13 → 10+10=20, 9+3=12 → 20+12= 32
- 16 + 21 → 10+20=30, 6+1=7 → 37
- 12 + 25 → 10+20=30, 2+5=7 → 37
- 19 + 32 → 10+30=40, 9+2=11 → 40+11= 51

Row 3:
- 22 + 12 → 20+10=30, 2+2=4 → 34
- 30 + 20 → 30+20= 50
- 62 + 42 → 60+40=100, 2+2=4 → 104
- 52 + 21 → 50+20=70, 2+1=3 → 73
- 60 + 12 → 60+10=70, 0+2=2 → 72

Row 4:
- 25 + 15 → 20+10=30, 5+5=10 → 30+10= 40
- 35 + 15 → 30+10=40, 5+5=10 → 40+10= 50
- 45 + 15 → 40+10=50, 5+5=10 → 50+10= 60
- 55 + 15 → 50+10=60, 5+5=10 → 60+10= 70
- 65 + 15 → 60+10=70, 5+5=10 → 70+10= 80

Row 5:
- 25 + 32 → 20+30=50, 5+2=7 → 57
- 34 + 13 → 30+10=40, 4+3=7 → 47
- 45 + 19 → 40+10=50, 5+9=14 → 50+14= 64
- 56 + 21 → 50+20=70, 6+1=7 → 77
- 62 + 14 → 60+10=70, 2+4=6 → 76

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✔ All calculations double-checked.

Final Answer:
52, 33, 40,
25, 23, 28, 24, 29,
37, 32, 37, 37, 51,
34, 50, 104, 73, 72,
40, 50, 60, 70, 80,
57, 47, 64, 77, 76