In which of the following situations would you use estimation?

Estimating the number of people in a crowded room

What is the purpose of rounding a number?

To make the number easier to work with

Which of the following is an example of mental math?

Estimating the total cost of items in a shopping cart

Which of the following is an example of estimation?

Estimating the length of a room

Which of the following is a strategy for mental math?

Breaking numbers into smaller pieces

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Secondary 1 Mathematics: Estimation and Approximation

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Estimation and Approximation NA and Express

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Questions 12

Answers

1
In which of the following situations would you use estimation?
Finding the exact area of a triangle
Measuring the exact weight of a fruit
Calculating the exact cost of a product
Estimating the number of people in a crowded room
2
What is the purpose of rounding a number?
To make the number easier to work with
To decrease the number of significant figures
To increase the number of significant figures
To change the value of the number
3
Which of the following is an example of mental math?
Calculating the exact area of a circle
Measuring the exact height of a tree
Counting the exact number of objects in a picture
Estimating the total cost of items in a shopping cart
4
A pool is 12 meters long, 5 meters wide, and 2 meters deep. About how many liters of water can the pool hold?
600
100
240
180
5
Which of the following is an example of using significant figures?
5.6 - 2.345 = 3.255
0.003 x 10 = 0.03
9.81 x 3.0 = 29.43
2.333 + 0.5 = 2.833
6
What is the main benefit of estimation?
It is always more accurate than approximation
It requires no mathematical skills
It helps save time and effort
It provides an exact answer to a problem
7
Which of the following is an example of estimation?
Measuring the exact weight of a bag of groceries
Calculating the exact area of a room
Counting the exact number of items in a jar
Estimating the length of a room
8
A store has 200 pens. If it estimates that 15% of the pens will be sold in the next week, how many pens will be sold?
15
45
30
60
9
A rectangle has sides of 5 meters and 8 meters. About how many square meters of area does the rectangle have?
26
40
64
13
10
A car gets about 30 km per liter of fuel. If the tank holds 15 liters, how many km can the car travel on a full tank?
300
150
600
450
11
Which of the following is an example of approximation?
Counting the exact number of books on a shelf
Measuring the exact length of a piece of rope
Rounding 3.14159 to 3.14
Estimating the total cost of a shopping cart to be $100
12
Which of the following is a strategy for mental math?
Using a calculator for every problem
Rounding to the nearest hundred
Memorizing all multiplication tables
Breaking numbers into smaller pieces

Secondary 1 Mathematics: Estimation and Approximation Flashcards | StudBud