Bird
45.678 → 3 s.f.
45.7
7.845 → 2 s.f.
7.8
0.006782 → 2 s.f.
0.0068
23.456 → 4 s.f.
23.46
0.04567 to 3 s.f
0.0457
Find the first non-zero digit.
This is the first significant figure.
If the rounding digit is less than 5 (0, 1, 2, 3, or 4)
leave the last significant figure unchanged.
Leading zeros are....
not significant
Zeros between non-zero digits are...
significant
If the rounding digit is 5 or greater (5, 6, 7, 8, or 9)
increase the last significant figure by 1.
A bottle contains 0.006782 litres of a chemical solution. Round this measurement to 2 significant figures.
0.0068L
A shopkeeper recorded the price of an item as $345. Round the price to 2 significant figures.
$350
A bottle contains 0.008764 litres of liquid. The teacher asks students to record the amount to 2 significant figures. What should they write?
0.0088L
A Grade 8 student measured a piece of string as 7.845 cm. Give the measurement to 2 significant figures.
A Jamaican farmer recorded the mass of a bag of fertilizer as 12.678 kg. Round the mass to 3 significant figures.
12.7 kg