Standard Algorithm Tuesday, September 16 2014. Goal I will be able to connect our diagrams and the distributive property to partial products of the.

Standard Algorithm Tuesday, September 16 2014

GoalI will be able to connect our diagrams and the distributive property to partial products of the standard algorithm without renaming.

Multiply by Multiples of 100

21x 4008400

312x30093,600

2,314x200462,800

Multiply using the Area Model

43x12 43

2

10

2x43= 86

43x10= 430

430+86= 516

Multiply using an area Model

243x12200 40 3

2

10

200x 2=400

40x2= 80

3x2=6

10x2002000

40x10=400

10x3=3-

2,000 400 400 80 30 + 6 2,916

Word Problem of the Day

Scientists are creating a material that may replace damaged cartilage in human joints. This hydrogel can stretch to 21 times its original length. If a strip of hydrogel measures 3.2 cm, what would its length be when stretched to capacity? 3.2x 21= 67.2

http://www.seas.Harvard.edu/news-events/press-release/tough-gel-stretches-to-21-times-its-length

Journal Entry

9/16 Area Model and Standard Algorithm

64x73

We will solve these problems using both an area model and the standard algorithm

65 X73 19545504745

70 3

4

60

70x4= 2804x3= 12

60x70= 4200 6x3= 18

814x39800 10 4

9

30

9x800=7200 9x10= 909x4= 36

800x30= 24000 30x10= 30030x4= 120

31746

624x82

624 x 82

1248 49920 51168

Problem SetYou may work with one person on the problem set

I will be calling groups to my back table.

Once you are finished please move your number to your new activity.

Exit TicketDraw an are model and solve the problem using the standard algorithm

78x42= 3276

783x42= 32,886