Let’s solve each multiplication problem step by step. We’ll multiply the two-digit numbers carefully, one at a time.
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First row:
1.
22 × 35
Break it down:
22 × 30 = 660
22 × 5 = 110
Add them: 660 + 110 =
770
2.
11 × 21
11 × 20 = 220
11 × 1 = 11
Add: 220 + 11 =
231
3.
12 × 26
12 × 20 = 240
12 × 6 = 72
Add: 240 + 72 =
312
4.
45 × 46
Let’s do 45 × 40 = 1800
45 × 6 = 270
Add: 1800 + 270 =
2070
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Second row:
5.
20 × 29
20 × 30 = 600 → but we need 20 × 29, so subtract 20 → 600 - 20 =
580
6.
37 × 27
37 × 20 = 740
37 × 7 = 259
Add: 740 + 259 =
999
7.
27 × 48
27 × 50 = 1350 → too big, so subtract 27 × 2 = 54 → 1350 - 54 =
1296
8.
12 × 42
12 × 40 = 480
12 × 2 = 24
Add: 480 + 24 =
504
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Third row:
9.
28 × 12
28 × 10 = 280
28 × 2 = 56
Add: 280 + 56 =
336
10.
30 × 43
30 × 40 = 1200
30 × 3 = 90
Add: 1200 + 90 =
1290
11.
21 × 39
21 × 40 = 840 → subtract 21 → 840 - 21 =
819
12.
42 × 16
42 × 10 = 420
42 × 6 = 252
Add: 420 + 252 =
672
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Fourth row:
13.
28 × 45
28 × 40 = 1120
28 × 5 = 140
Add: 1120 + 140 =
1260
14.
50 × 21
50 × 20 = 1000
50 × 1 = 50
Add: 1000 + 50 =
1050
15.
42 × 44
42 × 40 = 1680
42 × 4 = 168
Add: 1680 + 168 =
1848
16.
33 × 50
33 × 5 = 165 → then add a zero →
1650
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Fifth row:
17.
30 × 30
3 × 3 = 9 → add two zeros →
900
18.
15 × 49
15 × 50 = 750 → subtract 15 → 750 - 15 =
735
19.
48 × 43
48 × 40 = 1920
48 × 3 = 144
Add: 1920 + 144 =
2064
20.
36 × 11
Trick for multiplying by 11: 36 → 3 (3+6) 6 → 3 9 6 →
396
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Now let’s list all answers in order as they appear on the worksheet:
Row 1: 770, 231, 312, 2070
Row 2: 580, 999, 1296, 504
Row 3: 336, 1290, 819, 672
Row 4: 1260, 1050, 1848, 1650
Row 5: 900, 735, 2064, 396
Final Answer:
770, 231, 312, 2070, 580, 999, 1296, 504, 336, 1290, 819, 672, 1260, 1050, 1848, 1650, 900, 735, 2064, 396
Parent Tip: Review the logic above to help your child master the concept of 8th grade multiplication worksheet.
