Rounding & Estimation (Cambridge (CIE) IGCSE International Maths: Extended): Exam Questions

Write 57.3997 correct to 4 significant figures.

Calculate , writing down your full calculator display.

Write your answer to part (a) correct to 4 decimal places.

Write the number 10 100 correct to 2 significant figures.

Calculate.

Give your answer correct to 2 significant figures.

By writing each number correct to 1 significant figure, work out an estimate for .
You must show all your working.

i) 29 parcels each have a value of $68.   By writing each of these numbers correct to 1 significant figure, find an estimate for the total value of these 29 parcels.  

$ .................................................. [1]

ii) Without doing any calculation, complete this statement.  

The actual total value of these 29 parcels is less than the answer to part (i)

because ...................... [1]