Let’s solve each multiplication problem step by step. I’ll go row by row, left to right, and double-check every answer.
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Row 1:
1.
81 × 76
→ 80×76 = 6080; 1×76 = 76 → 6080 + 76 =
6156
2.
15 × 12
→ 15×10=150; 15×2=30 → 150+30 =
180
3.
78 × 25
→ 78×25 = (78×100)/4 = 7800/4 =
1950
*(or: 70×25=1750; 8×25=200 → 1750+200=1950)*
4.
8 × 22
→ 8×20=160; 8×2=16 → 160+16 =
176
5.
48 × 28
→ 50×28 = 1400; minus 2×28=56 → 1400 - 56 =
1344
*(or: 40×28=1120; 8×28=224 → 1120+224=1344)*
6.
19 × 9
→ 20×9=180; minus 1×9=9 → 180-9 =
171
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Row 2:
7.
91 × 11
→ 91×10=910; 91×1=91 → 910+91 =
1001
8.
98 × 8
→ 100×8=800; minus 2×8=16 → 800-16 =
784
9.
4 × 26
→ 4×20=80; 4×6=24 → 80+24 =
104
10.
18 × 15
→ 18×10=180; 18×5=90 → 180+90 =
270
11.
37 × 17
→ 30×17=510; 7×17=119 → 510+119 =
629
12.
95 × 29
→ 95×30=2850; minus 95×1=95 → 2850-95 =
2755
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Row 3:
13.
54 × 66
→ 50×66=3300; 4×66=264 → 3300+264 =
3564
14.
97 × 13
→ 100×13=1300; minus 3×13=39 → 1300-39 =
1261
15.
94 × 1
→ Any number ×1 is itself →
94
16.
83 × 7
→ 80×7=560; 3×7=21 → 560+21 =
581
17.
25 × 5
→ 25×5 =
125
18.
9 × 61
→ 9×60=540; 9×1=9 → 540+9 =
549
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Row 4:
19.
44 × 24
→ 40×24=960; 4×24=96 → 960+96 =
1056
20.
17 × 23
→ 17×20=340; 17×3=51 → 340+51 =
391
21.
85 × 6
→ 80×6=480; 5×6=30 → 480+30 =
510
22.
96 × 41
→ 96×40=3840; 96×1=96 → 3840+96 =
3936
23.
58 × 20
→ 58×2=116; add a zero →
1160
24.
45 × 0
→ Anything ×0 =
0
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Row 5:
25.
47 × 27
→ 47×20=940; 47×7=329 → 940+329 =
1269
26.
38 × 4
→ 30×4=120; 8×4=32 → 120+32 =
152
27.
84 × 14
→ 84×10=840; 84×4=336 → 840+336 =
1176
28.
77 × 36
→ 77×30=2310; 77×6=462 → 2310+462 =
2772
29.
27 × 10
→ Just add a zero →
270
30.
5 × 56
→ 5×50=250; 5×6=30 → 250+30 =
280
---
✔ All calculations verified.
Final Answer:
6156
180
1950
176
1344
171
1001
784
104
270
629
2755
3564
1261
94
581
125
549
1056
391
510
3936
1160
0
1269
152
1176
2772
270
280
Parent Tip: Review the logic above to help your child master the concept of math worksheets for 4th grade.
