Browse Rounding & bounds

56 questions at your level

DifficultyAllLevel 1Level 2Level 3Level 4Level 5

Rounding and significant figures

20 questions

LessonNot started
Round 38623862 to 1 significant figure.
●●●●●Level 11 markStart
Round 0.04720.0472 to 2 significant figures.
●●●●●Level 11 markStart
(a) Round 0.0047180.004718 to 2 significant figures. (1 mark)

(b) Round 0.0047180.004718 to 3 decimal places. (1 mark)
●●●●●Level 12 marksStart
Use your calculator to work out

19.6+2.738.4−3.15\dfrac{\sqrt{19.6} + 2.7^3}{8.4 - 3.15}
(a) Write down all the figures on your calculator display. (1 mark)
(b) Write your answer to part (a) correct to 3 significant figures. (1 mark)
●●●●●Level 12 marksStart
(a) Write 3.141593.14159 correct to 3 significant figures. [1]

(b) Write 0.067490.06749 correct to 2 significant figures. [1]
●●●●●Level 12 marksStart
Use your calculator to work out 7.32−2.921.6\dfrac{\sqrt{7.3^2 - 2.9^2}}{1.6}

Give your answer correct to 3 significant figures. [2]
●●●●●Level 12 marksStart

Estimation

15 questions

LessonNot started
Estimate the value of 48×2148 \times 21
●●●●●Level 12 marksStart
Estimate the value of 6122.9\dfrac{612}{2.9}
●●●●●Level 12 marksStart
Work out an estimate for 4.9×20.30.51\dfrac{4.9 \times 20.3}{0.51}

You must show your working. (2 marks)
●●●●●Level 12 marksStart

Upper and lower bounds

23 questions

LessonNot started
A length is 77 cm to the nearest centimetre. Write down the smallest possible length.
●●●●●Level 11 markStart
The height of a door is 198198 cm, correct to the nearest cm. Write down the upper bound of the height.
●●●●●Level 11 markStart