what is round off of 150 cm​

Sagot :

Answer:

If it is smaller than 145, we round it off to 140 (round down). If it is 145 or bigger, we round it off to 150 (round up). Since 144 is smaller than 145, we round it down to 140.

By convention, we normally round 0.5 up to the next whole number, so in fact,

11.5 cm ≤ actual length < 12.5 cm

We call 11.5 the lower bound and 12.5 the upper bound. We can also write the upper bound as

12.4999 . . . . or 12.49

where the dot above the 9 means that it is repeated indefinitely, or recurs.

It is important to see that 12.49 is not the upper bound, as, for example, the length could have been 12.498.