Multiplying by 10s
Solve the problem:
57 x 10 = ?
570
Estimate.
72 x 33
70 x 30 = 2100
44 x 11
Remember, how would you break down the 11?
Multiply separately and then add.
484
Using the longhand method, solve the problem.
27 x 12
324
A bus has 15 rows of seats. Each row has 4 seats. At the first stop, 25 people get off the bus. At the second stop, 3 people get off the bus, and 12 people get on the bus. How many empty seats are there after the second stop?
26 empty seats
Solve the problem:
44 x 10 = ?
440
Estimate.
12
x 45
10 x 50 = 500
47 x 19
Remember, break apart the 19. Multiply separately and add.
893
Using the partial product method, solve the problem.
27 x 14
378
Suzie has track practice for 1 hour on Tuesday and 2 hours on Thursday. How many hours does Suzie go to track practice in 15 weeks?
45 hours
Solve the problem:
588 x 10 = ?
5,880
Estimate.
46 x 22
50 x 20 = 1000
46 x 22
Remember, break apart the 22. Multiply separately and add.
1,012
Using the partial product method, solve the problem.
44 x 56
2464
Each small dog at doggy daycare weights 35 pounds. Each large dog weight 60 pounds. There are 4 small dogs and 6 large dogs. How much do the dogs weigh all together?
500 pounds
Solve the problem:
340 x 10 = ?
3400
Estimate.
55 x 67
60 x 70 = 4200
36 x 24
Break apart the 24. Multiply separately and add.
864
Using the longhand method, solve the problem.
22 x 38
836
A travel agency charges $64 for each bus ticket and $82 for each train ticket. How much does it cost to buy 3 bus tickets and 4 train tickets?
$520
Solve the Problem:
45,774x 10 = ?
457,740
Estimate.
91 x 89 =
90 x 90 = 8100
73 x 34
Remember, break apart the 34. Multiply separately and add.
2,482
Using whatever method you want, solve the problem.
66 x 89
5,874
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