Topic 3

Multiply by Multiples of 10 and 100

200

Brr Brr Patapin has a Fashion business in France Brr Brr Patapin makes $700 a day how much does Brr Brr Patapin makes in 4 days

Answer:2800

400

Tung Tung makes 5 hundred dollars a day how much does he make in 8 days

Answer:4000

600

Tralalero Tralala makes 700 dollars a day how much does he in 3 days 

Answer:2100

800

Ballerina Cappuccina gets 200 dollars a day how much does she get in 8 days

Answer:1600

1000

Bombardilo Crocadilo has 900 dollars he will get 900 dollars for 9 more days how much does he has in all.

Answer:8100

Estimate Products

200

Estimate: 9x62= 

Answer: 9x62= 

Estimated Answer: 540

Actual Answer: 558

400

Estimate: 4x72 

Answer: 4x72

Estimated Answer: 280 

Actual Answer:288

600

Estimate: 9x94 

Answer: 9x94

Estimated Answer:810 

Actual Answer: 846

800

Estimate: 9x121 

Answer: 9x121

Estimated Answer: 1080 

Actual Answer: 1089

1000

Estimate: 7x486 

Answer: 7x486

Estimated Answer: 3500

Actual Answer: 3402

Use arrays to Multiply by 1-Digit Numbers

200

2x105 use an array to solve

210

400

3x78 use an array to solve

234

600

6x49 use an array to solve

294

800

8x126 use an array to solve

1008

1000

7x342 use an array to solve

2394

Use Area Models to Multiply by 1-Digit Numbers

200

49x3 use an area model to solve

147

400

2x99 use an area model to solve

198

600

3x185 use an area model to solve

555

800

3x549 use an area model to solve

1647

1000

8x440 use an area model to solve

3520

Use Standard Algorithm to Multiply by 1-Digit Numbers

200

7x48 use standard algorithm to solve

336

400

8x66 use standard algorithm to solve

528

600

4x207 use standard algorithm to solve

828

800

5x329 use standard algorithm to solve

1645

1000

4x711 use standard algorithm to solve

2844