nearest next number either side of 5 middle number
2.309 goes to 2.31 as only 0.001 away (2.300 is larger 0.009 away)
2.31 goes to 2.3 as only 0.01 away
2.3 goes to 2 as only 0.3 away
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As the digit just after the decimal point is a 3, we round down, giving 147 as the answer.
It is 15.7
It requires two decimal places and as the third one is a 9, it will round the second digit up, to give 2.04 as the answer.
to round 68.4 to one decimal place = 68.4
To round to the nearest whole number the tenths digit (the one after the decimal point) is the deciding digit whether to round up or down - if it is less than 5 round down, otherwise round up. The tenths digit of 9.13 is 1 which is less than 5 so round down 9.13 → 9 to the nearest whole number.