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Vocabulary
Mental Math Multiplication
Estimating Products
Box Method Multiplication
Algorithm Method
100

What is "To find an answer that is close to the exact amount?"

Estimate

100

10x10=?

100

100

Use rounding and mental math to estimate the following  product:

36x42=?


40x40=1600

100

Use the box method to solve the following problem:

12x12=?


12x12=144


10x10=100

10x2=20

10x2=20

2x2=4

100+20+20+4=144

100

Solve the following problem using the Algorithm Method:

 11

x11

 11

x11

_____

  1 1

1 1 0

____

121

200

What is "the value of a digit in a number based on the location of the digit"

Place Value


200

30x50=?

1500

200

Use rounding and mental math to estimate the following  problem:

47x39=?

50x40=2000

200

Use the box method to solve the following problem:

31x24=?

31x24=744

30x20=600

20x1=20

30x4=120

1x4=4

600+20+120+4=744

200

Solve the following problem using the Algorithm Method:

30

x47


30

x47

____

 210

1200

_____

1410

300
What is "A number multiplied by another number to find a product?"

Factor

300

50x50=?

2500

300

Use rounding and mental math to estimate the following  problem:

51x73=?

50x70=3500

300

Use the box method to solve the following problem:

27x43=?

27x43=1161

20x40=800

7x40=280

20x3=60

7x3=21

800+280+60+21=1161

300

Solve the following problem using the Algorithm Method:

90

x28

90

x28

____

 720

1800

_____

2520

400

What is "a method in which you break apart the numbers to multiply them"

 Partial Products

400

70x60=?

4200

400

Use rounding and mental math to estimate the following  problem:

78x72=?

80x70=5600

400

Use the box method to solve the following problem:

36x28=?

36x28=1008

30x20=600

6x20=120

30x8=240

6x8=48

600+120+240+48=1008

400

Solve the following problem using the Algorithm Method:

 61

x54

61

x54

____

 244

3050

____

3294

500
What is "To exchange amounts of equal value to rename a number"


Ex: 5+8= 13 ones or 1 ten and 3 ones

Regroup

500

80x70=?

5600

500

Use rounding and mental math to estimate the following  problem:

87x54=

90x50=4500

500

Use the box method to solve the following problem:

87x16=?

87x16=1392

80x10=800

7x10=70

80x6=480

7x6=42

800+70+480+42=1392

500

Solve the following problem using the Algorithm Method:

 79

x66

 79

x66

____

 474

4740

____

5214