Let’s work through the problems one by one.
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Part 1: Multiplication Problems
We’ll solve each multiplication problem step by step.
1.
12 × 23
Break it down:
- 12 × 20 = 240
- 12 × 3 = 36
- Add them: 240 + 36 =
276
2.
20 × 11
Easy! 20 × 10 = 200, plus 20 × 1 = 20 → 200 + 20 =
220
3.
18 × 13
Break it:
- 18 × 10 = 180
- 18 × 3 = 54
- 180 + 54 =
234
4.
16 × 20
16 × 2 = 32, so 16 × 20 =
320
5.
17 × 12
- 17 × 10 = 170
- 17 × 2 = 34
- 170 + 34 =
204
6.
11 × 22
11 × 20 = 220, 11 × 2 = 22 → 220 + 22 =
242
7.
13 × 17
Same as 17 × 13 → we did that above:
221? Wait — let’s recalculate:
Actually, 13 × 17:
- 10 × 17 = 170
- 3 × 17 = 51
- 170 + 51 =
221
But earlier I said 18×13=234 — that’s correct. So 13×17 is indeed
221
8.
19 × 19
This is 19 squared.
- 20 × 19 = 380, minus 19 = 361 →
361
Or: (20 - 1)² = 400 - 40 + 1 = 361 → yes.
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Part 2: Division Problems
These are long division format. Let’s solve each.
1.
3 ) 42
How many times does 3 go into 42?
- 3 × 14 = 42 →
14
2.
6 ) 96
6 × 16 = 96 →
16
3.
2 ) 88
2 × 44 = 88 →
44
4.
5 ) 90
5 × 18 = 90 →
18
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All calculations checked and verified.
Final Answer:
Part 1: 276, 220, 234, 320, 204, 242, 221, 361
Part 2: 14, 16, 44, 18
Parent Tip: Review the logic above to help your child master the concept of multi digit multiplication and division worksheet.
