Unit 4 Multiplication Strategies (1)

The Davis family is on a road trip. They are stocking up on supplies for the trip and goes to the local grocery store. There are four people in the family. Mr. Davis is buying cases of water for the trip. Each case has 124 bottles of water. He buys one case for each person. How many

individual bottles of water does he buy? Use area model, expanded notation, or algebraic notation to solve.

• 128 individual bottles

• 496 individual bottles

• 124 individual bottles

• 136 individual bottles

Tags

CCSS.5.NBT.B.5

Mrs. Jones bought school supplies for the new school year. She purchased 115 boxes of pencils, each box contains 8 pencils. How many pencils did she have to start the school year? Use area model, expanded notation, or algebraic notation to solve.

• a. 200 pencils

• b. 800 pencils

• c. 1,640 pencils

• d. 920 pencils

Tags

CCSS.5.NBT.B.5

Brandy wants to solve the problem 147 x 3 using an area model. Solve 147 x 3 using the area model. Choose the correct answer. Use area model to solve.

• a. 333

• b. 156

• c. 587

• d. 441

Tags

CCSS.4.NBT.B.5

Which explanation is the BEST to explain the steps she used to solve 147 x 3 using the area model?

• a. I added the top numbers together. Then multiplied them. Then added them together. That's how I got my answer.

• b. I multiplied 3 by 147. Then I added those numbers together. I got 441

• c. First I decomposed 147 into 100 + 40 + 7. Then I multiplied 100 x 3 and got the partial product of 300. Next I multiplied 40 x 3 and got the partial product of 120. Then I multiplied 3 x 6 and got another partial product of 21. Lastly, I added all of the partial products together, 300 + 120 + 21 and got 441 as the final product for 147 x 3

• d. I multiplied first. Then I added the partial products and got my answer of 441

Tags

CCSS.4.NBT.B.5

Solve the problem 74 x 38 using the area model, expanded notation method or algebraic notation method. Choose the correct answer.

• a. 922

• b. 2,704

• c. 2,812

• d. 12,100

Tags

CCSS.5.NBT.B.5

Solve 32 x 18 using either area model, expanded notation, or algebraic notation. Choose the correct answer.

• a. 928

• b. 328

• c. 649

• d. 685

Tags

CCSS.4.NBT.B.5