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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

Ryan hiked 20 miles each day on a 12-day hiking trip. E'leana hiked 22 miles each day on her 16-day hiking trip. In all, how many more miles did E'leana hike than Ryan hiked?

What is 112 miles?

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

Janyla baked 36 cookies and made 12 Gingerbread houses for the holiday. How many items all together did she make for the holidays? (Hint: 36 x 12)

What is 432?

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
Each student in Ms. Sike's kindergarten class has a box of crayons. Each box has 36 crayons. If there are 18 students in Ms. Sike's class, how many crayons are there in all? (Use partial Products)
648 Crayons
300
91 X 19
What is 1,729
300

A wall on the side of a building is made up of 52 rows of bricks with 44 bricks in each row. How many bricks made up the wall?

What is 2,288 bricks?

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

53 x 68

What is 3,604?

400

A movie theater has 26 rows of seats. There are 18 seats in each row. How many seats are there?

What  is 468 seats?

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

236 x 18 

What is 4,248?

500

Mrs. Liss is hanging up Christmas lights. If she has 14 packs of lights that have 180 lights in each pack, how many lights will she have all together?

What is 2,520?