1. Measurement
Rounding

2. Rounding & Calculations
Measurement 1
2 S.F.
Volume = Length  Width  Height
Length = 1.3 cm
Fewest Possible S.F.
Calculation
Answer
Measurement 2
1 S.F.
1 S.F.
Volume
Width = 5 cm
L  W  H =
dropped digits
Measurement 3
cm3
1.3 cm  5cm  cm =
4 S.F.
1 Sig. Fig.
Height = cm
Round 1 up to 2
Answer: 2 00
cm3

3. Rules for Rounding (pg. 28)
Dropped digit > 5
Round UP by 1
Round cm to 4 S.F.
Answer: cm
DON’T round up
Dropped digit < 5
Round cm to 3 S.F.
Answer: cm
Dropped digit = 5
or =
Round UP if Odd (1,3,5, etc)
DON’T round up if already even
Round cm to 3 S.F.
Round cm to 3 S.F.
Answer: cm
Answer: cm