Ch.4 Review
Textbook
6 Math Nelson
Chapter
Chapter 4
Section
Ch.4
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Solutions 42 Videos

Use mental math to calculate each answer. Describe your strategy for two of your answers.

175 + 225

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Q1a

Use mental math to calculate each answer. Describe your strategy for two of your answers.

1999 + 1999

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Q1b

Use mental math to calculate each answer. Describe your strategy for two of your answers.

1000 - 325

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Q1c

Use mental math to calculate each answer. Describe your strategy for two of your answers.

2000 - 1698

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Q1d

a) A plane is flying at a height of 5000 m. It goes down 299 m. What is its height now? Use mental math. Describe your strategy.

b) The plane then goes up 500 m. What is its height now? Use mental math. Describe your strategy.

c) How far does it have to go down to get back to a height of 5000 m? Use mental math. Describe your strategy.

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Q2

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

66 457 + 9342 = 85 799

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Q3a

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

8765 + 5086 = 13 851

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Q3b

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

675 + 498 + 306 + 198 = 1477

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Q3c

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

10 000 - 3659 = 6341

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Q3d

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

6549 - 686 = 5863

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Q3e

Use estimation to decide which answers are reasonable. Show how you estimated. Correct the unreasonable answers.

23 000 - 8187 = 14 813

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Q3f

Calculate. Determine if your answers are reasonable. Show your work.

577 + 578 + 579 + 576

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Q4a

Calculate. Determine if your answers are reasonable. Show your work.

105 + 295 + 457 + 961

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Q4b

Calculate. Determine if your answers are reasonable. Show your work.

111 + 222 + 333 + 444

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Q4c

Calculate. Determine if your answers are reasonable. Show your work.

499 + 499 + 499 + 499

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Q4d

What is the difference between the perimeters of the shapes? Show your work.

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Q5

Calculate. Show your work.

2000 - 758 = \square

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Q6a

Calculate. Show your work.

6091 - \square = 6000

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Q6b

Calculate. Show your work.

18 534 - 6990 = \square

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Q6c

Calculate. Show your work.

56 312 - 3626 = \square

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Q6d

Calculate. Show your work.

15 500 - \square = 2849

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Q6e

Calculate. Show your work.

89 130 - 7625 = \square

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Q6f

Choose one of your answers from Question 6. Explain how you know that the answer is reasonable.

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Q7

The population of Cobourg, Ontario, in 2001 was 17 175. The number of males was 8050. The number of girls aged 14 and under was 1510. How many females were older than 14? Show your work.

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Q8

Use mental math to calculate each answer. Show your strategy for two of your answers.

$1.75 + $10.25

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Q9a

Use mental math to calculate each answer. Show your strategy for two of your answers.

1.99 + 2.28

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Q9b

Use mental math to calculate each answer. Show your strategy for two of your answers.

4.998 + 1.002

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Q9c

Use mental math to calculate each answer. Show your strategy for two of your answers.

20.00 - 13.97

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Q9d

Calculate. Determine if your answers are reasonable. Show your work.

4.89 + 1.50

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Q10a

Calculate. Determine if your answers are reasonable. Show your work.

0.7 + 0.36

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Q10b

Calculate. Determine if your answers are reasonable. Show your work.

3.865 + 0.95

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Q10c

Calculate. Determine if your answers are reasonable. Show your work.

5.005 + 1.997 + 0.998

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Q10d

Calculate. Determine if your answers are reasonable. Show your work.

1.589 + 2.300

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Q10e

Calculate. Determine if your answers are reasonable. Show your work.

10.498 + 0.532

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Q10f

The height of the cab on a truck is 2.750 m. There is a radio aerial with a height of 1.475 m on top of the cab. Will the aerial hit a highway overpass with a height of 4.000 m? Show your work.

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Q11

Calculate. Determine if your answers are reasonable. Show your work.

5.8 - 2.5

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Q12a

Calculate. Determine if your answers are reasonable. Show your work.

20.06 - 18.56

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Q12b

Calculate. Determine if your answers are reasonable. Show your work.

0.867 - 0.099

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Q12c

Calculate. Determine if your answers are reasonable. Show your work.

12.058 - 3.555

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Q12d

What is the mass of the bag and its contents?

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Q13

For a nutrition project, Craig found the mass of some fruit. Then he found the mass of their rinds or peels. What is the mass of each fruit without its rind or peel? Show your work.

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Q14

Paige’s school is trying to raise $2000 for UNICEF (United Nations Children’s Fund). They ran a car wash over two weekends. They charged $3.00 to wash each car. In four days, they washed 87, 104, 77, and 124 cars. How much more money do they have to raise to reach their goal of $2000? Write a solution.

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Q15