Show:
Base 10 Multiplication
Multiplication Estimation
Rounding
Expressions
100

How many tens are in 430?

43

100

21 x 4

80

100
What place is the 5 in? 

4,520

hundreds

100

The answer to an addition problem is called what?

The answer to a subtraction problem is called what?

Sum 

Difference

200

12 x 10

120

200

102 x 23

2,000

200

Round 67 to the nearest tens place.

70

200

The answer to a multiplication problem is called what?

The answer to a division problem is called what?

Product

Quotient

300

420 x 30

12,600

300

5,430 x 390

2,000,000

300
Round 7,845 to the nearest tens place

7,850

300

Draw a tape diagram for 4 x 25 

See drawing. 

400

1,400 x 300

420,000

400

Estimate 2x(39-21)

40

400

What place is the 4 in?

10.547

Hundreths place

400

Draw a tape diagram for 3x(20-4)

See whiteboard. 

500

14 thousands x 25 tens

35 hundred thousands

500

You want to buy a new outfit at your favorite store. The shirt is $19.75, the pants are $22.99, and the shoes are $12.25. About how much money should you bring? (not including sales tax)

About $50

500

Why is there no oneths place?

Answers will vary

500

Write an expression for the following

Five times the quotient of 49 an 7. 

See whiteboard.