Let me solve each multiplication problem step by step.
Problem 1: 482 × 29
First, multiply 482 × 9:
- 2 × 9 = 18 (write 8, carry 1)
- 8 × 9 = 72 + 1 = 73 (write 3, carry 7)
- 4 × 9 = 36 + 7 = 43
So: 482 × 9 = 4,338
Next, multiply 482 × 20 (which is 482 × 2 with a zero):
- 2 × 2 = 4
- 8 × 2 = 16 (write 6, carry 1)
- 4 × 2 = 8 + 1 = 9
So: 482 × 20 = 9,640
Add them together:
4,338 + 9,640 = 13,978
Problem 2: 236 × 49
First, multiply 236 × 9:
- 6 × 9 = 54 (write 4, carry 5)
- 3 × 9 = 27 + 5 = 32 (write 2, carry 3)
- 2 × 9 = 18 + 3 = 21
So: 236 × 9 = 2,124
Next, multiply 236 × 40 (which is 236 × 4 with a zero):
- 6 × 4 = 24 (write 4, carry 2)
- 3 × 4 = 12 + 2 = 14 (write 4, carry 1)
- 2 × 4 = 8 + 1 = 9
So: 236 × 40 = 9,440
Add them together:
2,124 + 9,440 = 11,564
Problem 3: 627 × 46
First, multiply 627 × 6:
- 7 × 6 = 42 (write 2, carry 4)
- 2 × 6 = 12 + 4 = 16 (write 6, carry 1)
- 6 × 6 = 36 + 1 = 37
So: 627 × 6 = 3,762
Next, multiply 627 × 40 (which is 627 × 4 with a zero):
- 7 × 4 = 28 (write 8, carry 2)
- 2 × 4 = 8 + 2 = 10 (write 0, carry 1)
- 6 × 4 = 24 + 1 = 25
So: 627 × 40 = 25,080
Add them together:
3,762 + 25,080 = 28,842
Problem 4: 244 × 64
First, multiply 244 × 4:
- 4 × 4 = 16 (write 6, carry 1)
- 4 × 4 = 16 + 1 = 17 (write 7, carry 1)
- 2 × 4 = 8 + 1 = 9
So: 244 × 4 = 976
Next, multiply 244 × 60 (which is 244 × 6 with a zero):
- 4 × 6 = 24 (write 4, carry 2)
- 4 × 6 = 24 + 2 = 26 (write 6, carry 2)
- 2 × 6 = 12 + 2 = 14
So: 244 × 60 = 14,640
Add them together:
976 + 14,640 = 15,616
Let me verify my calculations:
Parent Tip: Review the logic above to help your child master the concept of 2 and 3 digit multiplication worksheet.
