Lesson 08: Calculating Products of Decimals | Unit 5: Arithmetic in Base Ten

Open Ended

Which part of the rectangle has an area of 0.432? Which part of the rectangle has an area of 1.62? Show your reasoning.

Multiple Choice

What is $$(0.54)\cdot(3.8)$$ ?

• 2.052
• 1.432
• 2.500
• 3.000

Open Ended

Explain how the product of 3 and 65 could be used to find $$(0.03)\cdot(0.65)$$ .

Multiple Choice

What is the product of $$(5.4)\cdot (2.4)$$ using vertical calculation?

• 12.96
• 9.84
• 14.32
• 10.56

Multiple Choice

What is the product of $$(1.67)\cdot (3.5)$$ ?

• 5.845
• 5.00
• 6.12
• 4.75

Multiple Choice

A pound of blueberries costs $$3.98$$ and a pound of clementines costs $$2.49$$ . What is the combined cost of 0.6 pound of blueberries and 1.8 pounds of clementines? Round your answer to the nearest cent.

• 6.87
• 8.10
• 7.25
• 5.50

Open Ended

Jada calculates $$(2.6) \cdot (0.14)$$ by calculating $$26 \cdot 14$$ , then moving the digits three places to the right. Explain why Jada’s method makes sense, and use it to calculate $$(2.6) \cdot (0.14)$$ .

Open Ended

Diego calculates $$(2.6) \cdot (0.14)$$ using partial products. Explain how Diego computed the four partial products.

Multiple Choice

Which of the polygons has the greatest area?

• A rectangle that is 3.25 inches wide and 6.1 inches long.

• A square with side length of 4.6 inches.

• A parallelogram with a base of 5.875 inches and a height of 3.5 inches.

• A triangle with a base of 7.18 inches and a height of 5.4 inches.

Multiple Choice

What is the product of $$(0.25)\cdot(1.4)$$ ?

• 0.5
• 0.7
• 0.1
• 0.35