3.5 rounded to the nearest cm is 4cm
142.59996 sq kilometres, rounded to the nearest square centimetre is 1425999600000 sq cm. And if you did not mean 142.59996 sq km maybe you should have specified what you didmean.
5 cm is already rounded to the nearest 0.1 cm.
5 ft 10.5 inches = 70.5 inches = 70.5 * 2.54 cm = 179.07 inches which, rounded to the nearest cm is 179 cm.
2.3 is already rounded to the nearest tenth.
This is not a valid number.
3.5 rounded to the nearest cm is 4cm
Using Pythagoras' theorem and the area formula it is: 167 square cm to the nearest unit.
142.59996 sq kilometres, rounded to the nearest square centimetre is 1425999600000 sq cm. And if you did not mean 142.59996 sq km maybe you should have specified what you didmean.
That depends on what there are 1676 of. 1676 cm is already at the nearest cm. If it's some other unit of measure, you should indicate that.
3 cm
235 cm rounded to the nearest hundredths of an inch is 92.52 inches.
43 cm
Radius: square root of (1256/pi) = 20 cm rounded to nearest integer
Area: pi times 50 squared = 7854 square cm rounded to the nearest integer
Area of any circle = pi*radius squared
139mm rounded to the nearest centimetre is 14cm - and rounded to the nearest decimetre would be 1dm.