Calculators do not have a "round to the nearest tenth" button
because the label is too long to print on the calculator, and also
because it's so easy to do it by just looking at the number.
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2.7
its important to round decimals because when you have money and its 5.35 you would round it to 5.40 because its over 5 or it is 5 so ur rounding it to the next tenth or hundredth.
They can be 5.05, 5.06. 5.07, 5.08 and 5.09 of which when rounded to the nearest tenth is 5.1
There are an infinite number of them.Here are six9.9510.0110.0210.0310.0410.0499999999999999999
Presuming "2" is a whole number (meaning that we're not working in decimals) it would be 2 (the equivalent of 2.0). For rounding to "tenth" - Any number from 2.00 through 2.49999999 would round to 2 - but 2.5000 through 2.99999 would round to 3.