IM: 6.5.3: Adding and Subtracting Decimals with Few Non-Zero Digits (Practice)
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Last updated 11 months ago
12 questions
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Question 1
1.
Here is a base-ten diagram that represents 1.13. Use the diagram to find 1.13-0.46.
Explain or show your reasoning.
Compute the following sums. If you get stuck, consider drawing base-ten diagrams.
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Question 2
2.
0.027+0.004
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Question 3
3.
0.203+0.01
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Question 4
4.
1.2+0.145
Question 5
5.
A student said we cannot subtract 1.97 from 20 because 1.97 has two decimal digits and 20 has none. Do you agree with him? Explain or show your reasoning.
Question 6
6.
Decide which calculation shows the correct way to find and explain your reasoning.
Question 7
7.
Complete the calculations so that each shows the correct difference.
The school store sells pencils for $0.30 each, hats for $14.50 each, and binders for $3.20 each. Elena would like to buy 3 pencils, a hat, and 2 binders. She estimated that the cost will be less than $20.
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Question 8
8.
Do you agree with her estimate? Explain your reasoning.
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Question 9
9.
Estimate the number of pencils could she buy with $5. Explain or show your reasoning.
A rectangular prism measures 71/2 cm by 12 cm by 151/2 cm.
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Question 10
10.
Calculate the number of cubes with edge length 1/2 cm that fit in this prism.
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Question 11
11.
What is the volume of the prism in cm^3? Show your reasoning. If you are stuck, think about how many cubes with 1/2-cm edge lengths fit into 1 cm^3.
Question 12
12.
At a constant speed, a car travels 75 miles in 60 minutes. How far does the car travel in 18 minutes? If you get stuck, consider using the table.