Let’s solve each multiplication problem using the grid method shown in the worksheet. This method breaks each number into tens and ones, multiplies the parts, then adds them up.
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Problem 1: 62 × 39
Break it down:
- 62 = 60 + 2
- 39 = 30 + 9
Now fill the grid:
Top row (multiply by 30):
- 60 × 30 = 1800
- 2 × 30 = 60
Bottom row (multiply by 9):
- 60 × 9 = 540
- 2 × 9 = 18
Add all four results:
1800 + 60 = 1860
540 + 18 = 558
1860 + 558 =
2418
✔ So, 62 × 39 =
2418
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Problem 2: 82 × 32
Break it down:
- 82 = 80 + 2
- 32 = 30 + 2
Grid:
Top row (×30):
- 80 × 30 = 2400
- 2 × 30 = 60
Bottom row (×2):
- 80 × 2 = 160
- 2 × 2 = 4
Add them:
2400 + 60 = 2460
160 + 4 = 164
2460 + 164 =
2624
✔ So, 82 × 32 =
2624
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Problem 3: 41 × 92
Break it down:
- 41 = 40 + 1
- 92 = 90 + 2
Grid:
Top row (×90):
- 40 × 90 = 3600
- 1 × 90 = 90
Bottom row (×2):
- 40 × 2 = 80
- 1 × 2 = 2
Add them:
3600 + 90 = 3690
80 + 2 = 82
3690 + 82 =
3772
✔ So, 41 × 92 =
3772
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Problem 4: 78 × 46
Break it down:
- 78 = 70 + 8
- 46 = 40 + 6
Grid:
Top row (×40):
- 70 × 40 = 2800
- 8 × 40 = 320
Bottom row (×6):
- 70 × 6 = 420
- 8 × 6 = 48
Add them:
2800 + 320 = 3120
420 + 48 = 468
3120 + 468 =
3588
✔ So, 78 × 46 =
3588
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Final Answer:
62 × 39 = 2418
82 × 32 = 2624
41 × 92 = 3772
78 × 46 = 3588
Parent Tip: Review the logic above to help your child master the concept of area model worksheet.
