Exploring Multiplying Decimals through Story Problems

The video tutorial covers multiplying decimals through story problems. It includes calculating earnings and expenses for a bike purchase, determining calories from popcorn servings, calculating the cost of ground beef for tacos, and finding the area and perimeter of a picture frame. Each problem involves multi-step calculations, emphasizing the importance of understanding decimal placement and rounding in financial contexts.

If Carrie works 32 hours a week at $9.75 per hour, how much will she earn in a week?

• $300.00

• $312.00

• $312.50

• $320.00

Carrie wants to buy a bike for $350. If she has earned $312, how much more does she need?

• $48

• $38

• $28

• $58

If there are 156.5 calories in 2 cups of buttered popcorn, how many calories are in 12 cups?

• 783

• 1173

• 939

• 1254

How many servings of 2 cups are there in 12 cups of buttered popcorn?

• 4

• 5

• 6

• 7

If ground beef costs $2.75 per pound, how much will 4.5 pounds cost?

• $11.25

• $12.38

• $13.75

• $14.50

When calculating the cost of ground beef, why do we round to the nearest penny?

• Because money is always rounded to the nearest hundredth

• Because it's easier to calculate

• Because it looks better

• Because stores only accept rounded amounts

What is the area of a picture frame that is 8.25 inches by 10 inches?

• 82.5 square inches

• 80.25 square inches

• 85.5 square inches

• 83.25 square inches

How do you calculate the perimeter of a rectangle?

• Add the length and width and multiply by 2

• Multiply the length by 2 and the width by 2

• Add all the sides together

• Multiply the length by the width

What is the perimeter of a picture frame that is 8.25 inches by 10 inches?

• 39.5 inches

• 36.5 inches

• 37.5 inches

• 38.5 inches

Why is it important to line up decimals when adding or subtracting?

• To make the calculation easier

• To ensure accuracy

• To follow standard rules

• To avoid confusion