Lesson T1.4.3
T1.4.3 Estimation, error intervals and calculators Quiz: KS3 Maths, Unit 1
20 questions
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Lesson T1.4.3, Estimation, error intervals and calculators: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 1: Number, written with Revision Ninja.
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The 20 questions
-
Estimate 39 x 52 by rounding each number to 1 significant figure.
- 2500
- 2000
- 1800
- 2400
-
Estimate 612 ÷ 19.8 by rounding.
- 60
- 3
- 300
- 30
-
Estimate (0.48 x 7.9) ÷ 0.21.
- 20
- 200
- 2
- 0.2
-
Which is the best estimate of 19.8 x 4.1?
- 24
- 800
- 8
- 80
-
A calculator shows 7.6923. Round this to 2 decimal places.
- 7.7
- 8
- 7.6
- 7.69
-
A mass is 5.6 kg, measured to the nearest 0.1 kg. Which inequality shows its error interval?
- 5.6 ≤ m < 5.7
- 5.55 < m ≤ 5.65
- 5.55 ≤ m < 5.65
- 5.5 ≤ m < 5.6
-
A length is 12 cm to the nearest cm. Which is its greatest possible value?
- Just under 12.5 cm
- Just over 12.9 cm
- Exactly 12.5 cm
- Just under 12 cm
-
Estimate 0.287 x 49.8 by rounding.
- 1.5
- 15
- 1.8
- 150
-
A calculator shows 1.25E+3. What is this number as an ordinary number?
- 1.25
- 12 500
- 1250
- 125
-
Using a calculator, work out 2/3 + 1/7 correct to 3 decimal places.
- 0.8095
- 0.809
- 0.810
- 0.82
-
Estimate 4.9 x 0.31.
- 1.5
- 0.015
- 0.15
- 15
-
Four objects each have a mass of 7.5 kg, measured to 1 decimal place. What is the greatest possible total mass?
- 30 kg
- 29.8 kg
- 30.2 kg
- 28 kg
-
Estimate 5961 ÷ 29 by rounding each number to 1 significant figure.
- 2000
- 200
- 300
- 20
-
A calculator gives 4.472135955. Give this to 3 significant figures.
- 4.472
- 4.47
- 4.5
- 4.4
-
Which is the error interval for 0.6 measured to 1 significant figure?
- 0.55 ≤ x < 0.65
- 0.55 < x ≤ 0.65
- 0.6 ≤ x < 0.7
- 0.5 ≤ x < 0.6
-
A shop sells 19 items at £4.95 each. Estimate the total cost.
- £95
- £100
- £1000
- £20
-
Calculate 0.8 ÷ (0.3 x 0.7) correct to 2 decimal places.
- 3.8
- 3.81
- 2.38
- 3.82
-
A value of 3.45 is measured to 2 decimal places. Which of these could be the actual value?
- 3.455
- 3.444
- 3.44
- 3.449
-
A rectangle measures 3 cm by 5 cm, each to the nearest cm. What is the lower bound of its area?
- 15 cm²
- 11.25 cm²
- 12.25 cm²
- 10 cm²
-
Calculate (3.6 + 2.8)² ÷ 5.1 correct to 3 decimal places.
- 8.031
- 8.13
- 8.032
- 8.03
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