Let's solve each multiplication problem step by step. We'll go through them one at a time, showing the calculations clearly.
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Row 1:
1.
53 × 2
$ 50 × 2 = 100 $, $ 3 × 2 = 6 $ → $ 100 + 6 = 106 $
✔ 106
2.
64 × 2
$ 60 × 2 = 120 $, $ 4 × 2 = 8 $ → $ 120 + 8 = 128 $
✔ 128
3.
72 × 3
$ 70 × 3 = 210 $, $ 2 × 3 = 6 $ → $ 210 + 6 = 216 $
✔ 216
4.
63 × 3
$ 60 × 3 = 180 $, $ 3 × 3 = 9 $ → $ 180 + 9 = 189 $
✔ 189
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Row 2:
5.
84 × 2
$ 80 × 2 = 160 $, $ 4 × 2 = 8 $ → $ 160 + 8 = 168 $
✔ 168
6.
90 × 2
$ 90 × 2 = 180 $
✔ 180
7.
52 × 2
$ 50 × 2 = 100 $, $ 2 × 2 = 4 $ → $ 100 + 4 = 104 $
✔ 104
8.
43 × 2
$ 40 × 2 = 80 $, $ 3 × 2 = 6 $ → $ 80 + 6 = 86 $
✔ 86
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Row 3:
9.
70 × 3
$ 70 × 3 = 210 $
✔ 210
10.
80 × 2
$ 80 × 2 = 160 $
✔ 160
11.
94 × 2
$ 90 × 2 = 180 $, $ 4 × 2 = 8 $ → $ 180 + 8 = 188 $
✔ 188
12.
61 × 2
$ 60 × 2 = 120 $, $ 1 × 2 = 2 $ → $ 120 + 2 = 122 $
✔ 122
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Row 4:
13.
51 × 2
$ 50 × 2 = 100 $, $ 1 × 2 = 2 $ → $ 100 + 2 = 102 $
✔ 102
14.
41 × 4
$ 40 × 4 = 160 $, $ 1 × 4 = 4 $ → $ 160 + 4 = 164 $
✔ 164
15.
50 × 2
$ 50 × 2 = 100 $
✔ 100
16.
74 × 2
$ 70 × 2 = 140 $, $ 4 × 2 = 8 $ → $ 140 + 8 = 148 $
✔ 148
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✔ Final Answers:
```
53 × 2 = 106 64 × 2 = 128 72 × 3 = 216 63 × 3 = 189
84 × 2 = 168 90 × 2 = 180 52 × 2 = 104 43 × 2 = 86
70 × 3 = 210 80 × 2 = 160 94 × 2 = 188 61 × 2 = 122
51 × 2 = 102 41 × 4 = 164 50 × 2 = 100 74 × 2 = 148
```
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📝 Explanation:
Each problem is a two-digit number multiplied by a single-digit number. The method used is
breaking down the number into tens and ones, multiplying each part separately, and then adding the results.
For example:
- $ 53 × 2 = (50 + 3) × 2 = 50×2 + 3×2 = 100 + 6 = 106 $
This strategy makes multiplication easier and helps avoid errors in carrying over digits.
Let me know if you'd like this formatted as a printable worksheet!
Parent Tip: Review the logic above to help your child master the concept of fourth grade math worksheets.
