Rounding to significant figures

The Maths Habit Handout to print

  1. Round 6.247 to 1 decimal place.

    6.2

  2. Round 0.3951 to 2 decimal places.

    0.40

  3. Round 14.0836 to 3 decimal places.

    14.084

How many people live
in the United Kingdom?

About 69 million

Significant figure
A digit that tells you the size of a number. Start counting at the first digit that is not zero.

Round 4738 to 1 significant figure

Round to 2 significant figures

6274=6300

6 2 | 7 4

7 is 5 or more, so round up

Round to 2 significant figures

8149=8100

Round to 2 significant figures

6274=6300

Round to 2 significant figures

2847=2800

Round to 2 significant figures

6274=6300

Round to 1 significant figure

7351=7000

Round to 2 significant figures

6274=6300

Round to 3 significant figures

3864=3860

Round to 2 significant figures

6274=6300

Round to 2 significant figures

47.62=48

Round 0.0627 to 1 significant figure

Rounding to significant figures worksheet, page 1

Rounding to significant figures worksheet, page 2

Answer sheet

  1. A number rounded to 2 significant figures is 4700. What is the smallest it could have been?

    4650

  2. Round 19.96 to 3 significant figures.

    20.0

The UK has about 69.3 million people. Round that to 1 significant figure.

70 million

  1. Round 28 470 to 2 significant figures.

    28 000

  2. Round 0.0638 to 1 significant figure.

    0.06

  3. Ivy rounds 0.3046 to 2 significant figures and writes 0.3. What should she have written?

    0.30
Exit tickets to print