Double Digit Multiplication

Using any algorithm you choose, what is 16 x 22?

• 35

• 351

• 352

• 453

Solve 15 x 16 any way you choose.

• 240

• 210

• 58

• 31

What is 34 x 21? Solve any way you choose, but not with a calculator.

• 56

• 714

• 724

• 896

What are different ways to solve multi-digit multiplication? Write some definitions we have went over in this Chapter.

How can you solve 53 x 17?

• Partial Products

• Area Model

• Standard Algorithm

• All of the above

The Queen Mary's height above water is about the same as a 14-story building. What is the Queen Mary's height above water? (Hint: one story is about 12 feet tall.)

• 190 feet tall

• 28 feet tall

• 16 feet tall

• 168 feet tall

Ten years ago, Melissa planted a tree in her backyard. She has taken a photo of the tree every week so she can see how it has grown as time passed. How many photos of the tree does Melissa have now? (Hint: There are 52 weeks in one year.)

• 632 photos

• 120 photos

• 520 photos

• 620 photos

Mr. Morris bought sketchpads for 24 of his students. Each pad contained 50 sheets. How many sheets of paper were in all the pads?

• 1,000 sheets

• 1,200 sheets

• 1,400 sheets

• 1,600 sheets

Using an area model, what is 81 x 46? (Hint: the box will have 4 sections.)

• 75

• 756

• 643

• 324

There are 24 cars in the Speedy Cup Series. Each car has 13 workers in the pit area. How many pit-area workers are at the race?

• 312 racers

• 37 racers

• 372 racers

• 4,264 racers