# S2A Chapter 1 Extra Exercise

Quiz by Sin Kei Chan, updated more than 1 year ago More Less
 Created by Sin Kei Chan about 3 years ago
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### Description

Approximation and Error

## Resource summary

### Question 1

Question
Round off 183.577 to 3 significant figures. [blank_start]184[blank_end]
• 184

### Question 2

Question
Round off 29.05 to 3 significant figures. [blank_start]29.1[blank_end]
• 29.1

### Question 3

Question
Round off 17 to 3 significant figures. [blank_start]17.0[blank_end]
• 17.0

### Question 4

Question
Round off 299700 to 3 significant figures. [blank_start]300000[blank_end]
• 300000

### Question 5

Question
How many significant figures are there if the following numbers are rounded off to the nearest ten? 197 [blank_start]2[blank_end] 277453.69 [blank_start]5[blank_end] 10.7 [blank_start]1[blank_end] 995 [blank_start]3[blank_end] 10000 [blank_start]4[blank_end]
• 2
• 5
• 1
• 3
• 4

### Question 6

Question
Estimate the value of the following expressions by rounding off each number to 2 significant figures. 137 + 255 x 299.7 [blank_start]78140[blank_end] 25.7 x 0.0197 + 17.49 [blank_start]17.52[blank_end] 291 + 374 - 299 [blank_start]360[blank_end]
• 78140
• 17.52
• 360

### Question 7

Question
Find the absolute error when the following data are rounded off to 3 significant figures. 13995.7 [blank_start]4.3[blank_end] 2997.33 cm [blank_start]2.67[blank_end] cm 0.07745 km [blank_start]0.00045[blank_end] km 1.777777 L [blank_start]0.002223[blank_end] L
• 4.3
• 2.67
• 0.00045
• 0.002223

### Question 8

Question
Express the actual value of a data in terms of "absolute error" and "relative error". actual value = [blank_start]absolute error[blank_end]/[blank_start]relative error[blank_end]
• absolute error
• relative error
• maximum error
• percentage error

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