multiplication

Properties Estimation 2 digit by 2 digit

3 digit by 2 digit Word Up!

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500

Properties100 points

3 x 0 = 0

Properties 100 points

Zero Property

Properties 200 points

3 x 4 = 4 x 3

Properties 200 points

Commutative Property

Properties 300 points

( 3 x 5) x 6= 3 x ( 5x 6)

Poperties 300 points

•Associative Property of Multiplication

Properties 400 points

8 x 1 = 8

Properties 400 points

• Identity Property

Properties 500

( 6 x 1) x 0 = 6 x (1 x 0)

Properties 500

Associative Property of Multiplication

Estimation 100 points

36 x 27 = ?

Estimation 100 points

36 x 27 = ? 40 x 30 = 1200

Estimation 200 points

214 x 99 = ?

Estimation 200 points

214 x 99 = ?200 x 100 = 20,000

Estimation 300 points

56 x 4 = ?

Estimation 300

56 x 4 = ?60 x 4 = 240

Estimation 400 points

405 x 67 = ?

Estimation400 points

405 x 67 = ?400 x 70 = 28, 000

Estimation 500 points

985 x 7 = ?

Estimation 500 points

985 x 7 = ?1000 x 10= 10,000

2 by 2 100

44 x 23 = ?

2 by 2 100 points

1012

2 by 2 200 points

72 x 51 = ?

2 by 2200 points

3,672

2 by 2 300 points

19 x 15 = ?

2 by 2300 points

285

2 by 2400 points

81 x 11 = ?

2 by 2400 points

891

2 by 2 500 points

25 x 31 = ?

2 by 2500 points

775

3 by 2100 points

451 X 10 = ?

3 by 2100 points

4510

3 by 2200 points

132 x 47 = ?

3 by 2200 points

6,204

3 by 2300 points

901 x 62 = ?

3 by 2300 points

55,862

3 by 2400 points

515 x 35 = ?

3 by 2400 points

18,025

3 by 2500 points

236 x 46 = ?

3 by 2500 points

10,856

Word Up 100 points

The fifth grade at Saint Pius X School sold more popcorn than any other class. Their order was for 17 cases of popcorn. Each case held 242 bags of popcorn. How many bags were sold by the fifth grade?

Word Up 100 points

The fifth grade class sold 4,114 bags of popcorn.

Word Up 200 points

Is 3,198 a reasonable product for 727 x 44?Why or why not?

Word Up 200 points

No, because if estimated the product would be 28,000.

727 x 44 =?700 x 40= 28,000

Word Up 300 points

There are 18 classrooms at Saint Pius X School Each classroom holds about 25 students. What is an estimate of the number of students at Saint Pius X School?

Word Up 300 points

An estimate of the number of students at Saint Pius X School would be about 600 students.20 x 30= 600

Word Up 400 points

Mrs. Dates is buying 3 computers at the cost of $900 for each computer. If she buys them on credit and pays $98 per month will she have paid for all of the computers at the end of 12 months?

Word Up 400 points

The total cost of the computers is $2,700. If bought on credit at the end of 12 months Mrs. Dates will have paid $1,176. The computers will not be paid in full at the end of one year.

It will take about 28 months or more than 2 years to pay for the computers if bought on credit.

Word Up 500 points

Kiran helped his father clean the garage this weekend. If Kiran took eight 15 minute breaks, how much time did he spend on breaks?

Word Up 500 points

• 8 x 15 = 120• Kiran spent 120 minutes on breaks or 2 hours.