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

175 + 225

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Q1a

1999 + 1999

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Q1b

1000 - 325

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Q1c

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

577 + 578 + 579 + 576

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Q4a

105 + 295 + 457 + 961

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Q4b

111 + 222 + 333 + 444

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Q4c

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

2000 - 758 = \square

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Q6a

6091 - \square = 6000

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Q6b

18 534 - 6990 = \square

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Q6c

56 312 - 3626 = \square

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Q6d

15 500 - \square = 2849

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Q6e

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

$1.75 +$10.25

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Q9a

1.99 + 2.28

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Q9b

4.998 + 1.002

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Q9c

20.00 - 13.97

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Q9d

4.89 + 1.50

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Q10a

0.7 + 0.36

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Q10b

3.865 + 0.95

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Q10c

5.005 + 1.997 + 0.998

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Q10d

1.589 + 2.300

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Q10e

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

5.8 - 2.5

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Q12a

20.06 - 18.56

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Q12b

0.867 - 0.099

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Q12c

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.

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.