Multiplication

With Zeros

100

20 x 40

800

200

10 x 300

3,000

300

45 x 20

900

400

2,000 x 50

100,000

500

(20 x 20) x 40

16,000

Times 1

100

21 x 5

105

200

103 x 4 

412

300

234 x 5

1,170

400

413 x 6

2,478

500

DOUBLE!!

Estimate and find the exact product:

5,842 x 3

Estimation: 18,000

Product: 17,526

Times 2

100

34 x 30

1,020

200

78 x 24

1,872

300

DOUBLE POINTS!!

Estimate and find the exact product.

94 x 52

Estimation: 4,500

Product: 4,888

400

63 x 27

1,701

500

234 x 78 

18,252

Decimals

100

0.7 x 0.9

0.63

200

8.7 x 3

26.1

300

0.27 x 31

8.37

400

DOUBLE POINTS!

Estimate and find the product.

2.6 x 0.9

Estimation: 3

Product: 2.34

500

3.25 x 25

81.25

Random

100

What is missing to make this true?

5.5 x 6 = 6 x 55 x _____

0.1

200

What is easy to get into but hard to get out of?

Trouble

300

Solve all 3 to get the points...

4 x 10¹= ______

4 x 10² =______

4 x _____ = 0.04

40

400

0.01

400

David's parents have 3 sons: Snap, Crackle and ____?

David

500

Solve all 3 to get DOUBLE POINTS!!

5.6 x 10² = _______

5.6 x _____ = 0.56

23 x ______ = 23,000

560

0.1

10³