Multiply by Ten
Estimate Products
Partial Products
Multiply With Regrouping
Problem Solving
100
60 X 20
What is 1,200
100
Estimate the product 63 X 19
What is 1,200
100
Find the product using partial products: 13 X 42
The partial products are 400, 120, 20, and 6. The product is 546.
100
48 X 38
What is 1,824
100

There are 48 crayons in a box. There are 12 boxes in a carton.  Mr. Johnson ordered 6 cartons of crayons for the school.  How many crayons did they get?

3,456 crayons

200
10 X 90
What is 900
200
What is the best estimate for the product 43 X 68? A: 3,500 B: 2.800 C. 2,400 D: 280
What is B
200

Find the product using partial products: 15 X 24

The partial products are 200, 100, 40, and 20. The product is 360.

200
59 X 52
What is 3,068
200

Elton hiked 16 miles each day on a 12-day hiking trip. Lola hiked 14 miles each day on her 16-day hiking trip.  In all, how many more miles did Lola hike than Elton? 

32 miles

300
For the school play, 40 rows of chair are set up. There are 22 chairs in each row. How many chairs are there in all?
What is 880
300
Estimate the product of 78 X 21
What is 1,600
300

Find the product using partial products: 17 X 36

The partial products are 300, 210, 60, and 42. The product is 612.

300
91 X 19
What is 1,729
300

John's Bike Shop ordered 17 boxes with 85 ball bearings in each. They also ordered 15 boxes with 90 springs each.  How many more ball bearings than springs did they order?

95 ball bearings

400
At West School, there are 20 classrooms. Each classroom has 20 students. How many students are at West School?
What is 400
400
A half-dollar has a diameter of about 31 millimeters. About how many millimeters long would a row of 56 half-dollars be?
What is about 1,800 millimeters
400
Solve using partial products: 16 X 19
The partial products are 100, 40, 60, and 24. The product is 224.
400

32 x 17

What is 544? 

400

Mike has 16 baseball cards. Niko has 17 times as many baseball cards as Mike.  How many baseball cards does Niko have?

272 baseball cards

500
Kenny bought 20 packs of baseball cards. There are 12 cards in each pack. How many cards did Kenny buy?
What is 240 Cards
500
How could you estimate the product 253 X 93? (Explain and find the estimated product)
I would round 253 to the nearest hundred and round 93 to the nearest ten. 300 X 90 = 27,000
500
Solve using partial products: 23 X 25
The partial products are 400, 100, 60, and 15. The product is 575.
500

36 x 28

What is 1,008?


500

A clothing store sells 26 shirts and 22 pairs of jeans.  Each item of clothing costs $32.  What is the total cost of all the clothing?

$1,536

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