Which of the following estimation strategies must NOT give an approximate value greater than the exact value?
I. Rounding off
II. Rounding up
III. Rounding down
S1 8.2 Numerical Estimation
Quiz
•
Mathematics
•
8th Grade
•
Medium
Siu Ip
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13 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following estimation strategies must NOT give an approximate value greater than the exact value?
I. Rounding off
II. Rounding up
III. Rounding down
I only
II only
III only
I and II only
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the approximate value of 759 is 760, which of the following methods may be used in the estimation?
I. Rounding off
II. Rounding up
III. Rounding down
I only
II only
I and II only
I and III only
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
By rounding off each number to the nearest ten, estimate the value of
812 + 659 − 107 + 521 − 226.
1659
1660
1650
1700
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
By rounding up each number to the nearest integer, estimate the value of
−53.4 + 20.7 + 73.6 − 55.3 + 25.8.
13
12
11
10
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
By rounding down each number to the nearest hundred, estimate the value of
4 376 + 1826 − 492 + 1520.
7300
7240
7230
7200
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following estimations has used rounding up as the estimation strategy?
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Mia wants to buy three items of prices $52.3, $65.4 and $97.8 in a shop. It is given that a customer can get a lucky draw ticket for any purchase of $200 or above in the shop. To determine whether Mia can get a lucky draw ticket or not, which of the following expressions should be used to estimate the total purchase made by her?
$50 + $60 + $90
$50 + $60 + $100
$50 + $70 + $100
$60 + $70 + $100
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