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Number The keywords for each question in this search are: Question 1: Rounding; decimals |
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QUESTION 1 Which of these is 89.0638 rounded to the nearest hundredth? (A) 100 |
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QUESTION 2 Mr Lewis had $360. He spent
Answer: __________ |
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QUESTION 3 Three-fifths of the students in a class are girls. If 5 girls and 5 boys are added to the class, which statement is true of the class? (A) There are more girls than boys. |
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QUESTION 4 Multiply: 0.203 × 0.56 =
Answer: __________ |
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QUESTION 5 Rounded to the nearest 10 kg the weight of a dolphin was reported as 170 kg. Write down a weight that might have been the actual weight of the dolphin.
Answer: __________ |
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QUESTION 6 Mark's garden has 84 rows of cabbages. There are 57 cabbages in each row. Which of these gives the BEST way to estimate how many cabbages there are in all? (A) 100 × 50 = 5000 |
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QUESTION 7 Teresa wants to record 5 songs on tape. The length of time each song plays for is shown in the table.
ESTIMATE to the nearest minute the total time taken for all five songs to play and explain how this estimate was made.
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QUESTION 8
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QUESTION 9
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QUESTION 10 A stack of 200 identical sheets of paper is 2.5 cm thick. What is the thickness of one sheet of paper? (A) 0.008 cm |
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QUESTION 11 Elena worked 57 hours in March, 62 hours in April, and 59 hours in May. Which of these is the BEST estimate of the total number of hours she worked for the three months? (A) 50 + 50 + 50 |
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QUESTION 12 The weight (mass) of a clothes peg is 9.2 grams. Which of these is the best estimate of the total weight of 1000 clothes pegs? (A) 900 g |
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QUESTION 13 Divide (A) 0.515 |
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QUESTION 14 Sound travels at approximately 330 metres per second. The sound of an explosion took 28 seconds to reach a person. Which of these is the closest estimate of how far away the person was from the explosion? (A) 12 000 m |
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QUESTION 15 There are 68 rows of cars in a car park. Each row has 92 cars. Which of these would give the closest estimate of the total number of cars in the car park? (A) 60 × 90 = 5400 |
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QUESTION 16 A company produced 17 175 cars in 1996. For a report, this number was rounded to the nearest hundred. Which was the number of cars given in the report? (A) 17 000 |
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QUESTION 17 A painter had 25 L of paint. He used 2.5 L of paint every hour. He finished the job in 5.5 hours. How much paint did he have left? (A) 10.25 L |
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QUESTION 18 Hine had a bag of marbles. She gave a third of them to Rebecca, and then a quarter of the remaining marbles to Jamie. Hine then had 24 marbles left in the bag. How many marbles were in the bag to start with? (A) 36 |
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QUESTION 19 A sheet of paper is 0.012 cm thick. Which of the following would be the height of a stack of 400 sheets of this paper? (A) 0.048 cm |
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QUESTION 20 The total weight of a pile of 500 salt crystals is 6.5 g. What is the mean (average) weight of a salt crystal? (A) 0.0078 g |
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QUESTION 21 Laura had $240. She spent
Answer: __________ |
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QUESTION 22 The height of a boy was reported as 140 cm. The height had been rounded to the nearest 10 cm. What are two possibilities for the boy's actual height?
Answer: _______________ cm and _______________ cm |
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QUESTION 23 Chris plans to order 24 issues of a magazine. He reads the following advertisements for two magazines. Ceds are the units of currency in Chris' country.
Which magazine is the least expensive for 24 issues? How much less expensive? Show your work. |