How to use cm and mm

In our class some of the people did some maths about how to use cm and mm.
First we learn cm. When its 2.8cm it is difficult to get answer with a ruler so we learnt about rounding to the nearest whole number to 2.8cm. So answer is 3cm because 2.8cm is nearest to 3cm.

Some of the people did a mm maths programme.
mm is little bit more difficult than cm because it is thinner to measure but we learnt about how to use mm. Now we are going to  do a question. What is 2.6cm in mm? Easy! First we have to times 10 to move the decimal point to the right. So the answer is 26mm.


Posted by D.K. and S.N.