placeholder image to represent content

Using inequality notation for errors in calculations

Quiz by Oak National Academy: KS3 Maths (2)

Feel free to use or edit a copy

includes Teacher and Student dashboards

Measure skills
from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can

edit the questions
save a copy for later
start a class game
automatically assign follow-up activities based on students’ scores
assign as homework
share a link with colleagues
print as a bubble sheet

Q 1/6
Score 0
__________ are the digits in a number that contribute to the accuracy of the number. The first significant figure is the first non-zero digit.
29
Important numbers
Real numbers
Estimated numbers
Significant figures

Our brand new solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

New Quizalize solo game modes

6 questions

Show answers

Q1
__________ are the digits in a number that contribute to the accuracy of the number. The first significant figure is the first non-zero digit.
Important numbers
Real numbers
Estimated numbers
Significant figures
30s
Q2
When a number, $x$ , is rounded to the nearest integer the result is 35. Select the numbers which complete the error interval for $x$ : $\square \leq x <\square$
$34.5$ and $35.5$
$34.999$ and $35.999$
$35$ and $45$
$34.4 \dot 9$ and $35.4 \dot 9$
30s
Q3
A long road is made up of 3 sub roads. The 1st road measures 35 m (2 s.f), the 2nd road is 41 m (2 s.f) and the 3rd road is 48 m (2 s.f). Find the error interval for the length $x$ of the long road.
$122 \leq x < 125$
$122.5 \leq x < 125.5$
$122.5 \leq x < 125.59$
$124.5 \leq x < 126.5$
30s
Q4
A wall is in an L-shape. All the lengths are given to 1 d.p or the nearest integer. Work out the error interval for the area of the wall.
$18 \leq x <23$
$18.7875 \leq x <23.6375$
$19.6375 \leq x < 22.7875$
$18.96 \leq x <20.96$
30s
Q5
A square has lengths in cm given to 1 decimal place. The error interval of the perimeter of the square is $31 \leq x <31.4$ . Work out the length of the square correct to 1 d.p.
7.4
7.2
7.8
8.0
7.6
30s
Q6
A square has lengths in cm to 1 decimal place. The error interval of the area of the square is $30.8025 \leq x <31.9225$ . Work out the length of the square to 1 d.p.
5.3 cm
5.6 cm
5.5 cm
5.4 cm
5.8 cm
30s

Teachers give this quiz to your class