Multiply by 10s

Multiply by 10s

Estimate

Double-Digit Multiplication

Multi-step Word Problems

Vocabulary

100

50 x 20

1,000

100

Estimate 26 x 35

30 x 40 = 1,200

100

23 x 18

414

100

Sharon practices piano for 2 hours on Mondays and for 1 hour on Wednesday. If she's played for 36 weeks now, how many hours has she practiced?

(1 + 2) x 36 = 108 hours

100

Give an example of the Commutative Property of Multiplication.

a x b = b x a

200

50 x 40

2,000

200

If I estimate 26 x 35, will the estimation be greater than or less than the actual product?

greater than

200

46 x 59

2,714

200

Cameron scored 18 points in his first game, 12 points in his second game, and 23 points in his third game. If his dad promised to pay him 25 cents per point, how much money will he have earned so far?

(18 + 12 + 23) x 25 = 1,325 cents or $13.25

200

In math, an operation means you are performing one of these four actions.

addition, subtraction, multiplication, division

300

68 x 40

2,720

300

If I estimate 56 x 75, will the estimation be greater than or less than the actual product?

greater than

300

42 x 35

1,470

300

A travel agency charges $64 for each bus ticket and $82 for each train ticket. How much does it cost to buy 4 bus tickets and 3 train tickets.

(64 x 4) + (82 x 3) = $502

300

What is the answer to a multiplication equation called?

Product

400

80 x 76

6,080

400

Estimate 56 x 75

60 x 80 = 4,800

400

67 x 69

4,623

400

Brandon's book sells for $25 each. If he sold 14 on Monday and 23 on Tuesday, how much money did he make?

(14 + 23) x 25 = $925

400

Give an example of the Associative Property of Multiplication.

(a x b) x c = a x (b x c)

500

89 x 70

6,230

500

Dakota earns $13 an hour coding. If he works 38 hours this week, about how much money will he make?

10 x 40 = $400

500

99 x 99

9,801

500

A bus has 15 rows of seats. Each row has 4 seats. At the first stop, 25 people get on the bus. At the second stop, 3 people get off of the bus, and 12 people get on the bus. How many empty seats are there after the second stop?

(15 x 4) - 25 + 3 - 12 = 26 seats

500

This property states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.

Distributive Property

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