Show:
Estimation
Missing Factor
Multiply 2 by 2
Multiply 3 by 2
Word Problem
100

Estimate 23 x 45

20 x 50= 1,000

100

Which number makes the equation true?  

40 x ___= 16,000

A)4

B) 40

c) 400

d) 4,000

C) 400

100

52 x 13

676

100

Which is the product? 456 x 52

A) 23,256

B) 23,712

C) 24,168

D) 24,624

B) 23,712

100

There are 26 bottles of paint in one set.  How many bottles of paint are in 52 sets?

1,352

200

Don works 18 hours a week.  Which expression shows a good way to estimate how many hours he works in 52 weeks?

A) 10 x50

B)20 x 50

C) 10 x 60

D)18 x 60

B) 20 x 50

200

What number makes the equation true?

___ x 600= 12,000

20

200

62 x 25

1,550

200

480 x 16

7,680

200

Liz makes necklaces.  Each has 16 beads.  How many beads do 30 necklaces have?

16 x 30= 480

300

Which is the best estimate for  176 x 742?

A) 140,000

B) 160,000

C) 180,000

D) 200,000

A)140,000

200 x 700= 140,000

300

What is the missing value?

70 x ___ = 21,000

300

300

Check if Avery's work is reasonable. Correct the work if needed.

92 x 43= 554

Unreasonable- 3,956

300

878x 62

54,436

300

Liz makes necklaces.  Each has 16 beads.  How many beads do 50 necklaces have?

800

400

A factory makes 132 laptops each day.  ABOUT how many laptops does the factory make in 45 days?

100 x 50= 5,000

400

What is the missing value?

900 x ____ = 5400

5

400

What is the product of 21 x 40?

840

400

Manuela goes to school 180 days this year.  Each day she spends 45 minutes in math.  How many minutes will Manuela be in math this year?

180 x 45=8,100

400

One box has 27 jars of strawberry jam.  How many jars are in 82 boxes?

27 x 82= 2,214 jars

500

Select all products with an estimate close to 150,000.

A) 288x491

B)482 X 327

C)313 X 507

D)368 X 642

E) 375 x 231

A,B,C

A) 300 x 500= 150,000

B)500 x 300 = 150,000

C)300 x 500= 150,000

D)400 x 700= 280,000

E) 400 x 200= 80,000

500

The product of two factors is 2,000.  One factor is 50.  What is the other factor?

A) 20

B) 200

C) 40

D) 400

C) 40

500

Margo hiked 12 miles 13 times last month.  She hiked 14 miles 12 times this month.  How much has she run in these two months?

12 x 13=156

14 x 12= 168

156 + 168=324miles



500

789 x 88

69,432

500

A factor makes 132 laptops each day.  How many laptops does the factory make in 45 days?

132 x 45= 5,940 laptops