Five Features of Kumons Small-Step Worksheets | The Kumon Method ... - Free Printable

Let’s solve the math problems shown on the second step from the left — the one with simple addition facts.

We’ll go row by row and calculate each sum carefully.

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First column:

17 + 8 = ?

→ 17 + 3 = 20, then +5 more → 25
✔ 25

27 + 17 = ?

→ 27 + 10 = 37, then +7 = 44
✔ 44

8 + 27 = ?

→ Same as above (addition is commutative) → 35? Wait — let’s check:
8 + 20 = 28, then +7 = 35
Wait — that contradicts earlier. Let me recalculate:

Actually, 27 + 17 was 44 — correct.
But 8 + 27:
8 + 20 = 28, 28 + 7 = 35 → ✔ 35

Hold on — I think I made a mistake in grouping. Let’s list them again clearly:

The problems are:

Row 1: 17 + 8
Row 2: 27 + 17
Row 3: 8 + 27
Row 4: 12 + 10
Row 5: 22 + 10
Row 6: 29 + 11
Row 7: 50 + 50
Row 8: 90 + 100
Row 9: 90 + 200

Let’s compute each one step by step without rushing.

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Step-by-step calculations:

1. 17 + 8
17 + 3 = 20 → 20 + 5 = 25
→ 25

2. 27 + 17
27 + 10 = 37 → 37 + 7 = 44
→ 44

3. 8 + 27
8 + 20 = 28 → 28 + 7 = 35
→ 35

4. 12 + 10
Easy → 22
→ 22

5. 22 + 10
→ 32
→ 32

6. 29 + 11
29 + 1 = 30 → 30 + 10 = 40
→ 40

7. 50 + 50
→ 100
→ 100

8. 90 + 100
→ 190
→ 190

9. 90 + 200
→ 290
→ 290

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Now, let’s double-check any that might be tricky:

- 8 + 27: Yes, 35 — because 27 + 8 = 35 (same as 20+8=28, +7=35)
- 29 + 11: 29 + 10 = 39, +1 = 40 → correct
- All others are straightforward.

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Final Answer:
25, 44, 35, 22, 32, 40, 100, 190, 290