Personally, I have always been taught to round up. (ex. if an answer is 0.5, I usually round it to 1.)
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5 is rounded up as for example 2.5 to the nearest whole number is 3 because .5 is rounded up to 1
7 will round up.
it goes up
if the unit digit ie the '3' in 53 is less than 5, round down - if the unit digit is 5 -9 you round up.. Examples... 41 - round down to 40 67 - round up to 70 59 - round up to 60 33 - round down to 30 56 - round up to 60 75 - round up to 80
Typically 5 is the number to determine whether or not you should round up or down. When the number is 5 or greater, you round up, if it's less than 5 you round down. In other words, if you were to round to the nearest 10s place when you have a 4, you would round down to 0.
Whether to round up or down depends on the digit in the units column. If the unit value is less than 5, you round down, if the unit value is 5 or above, round up. For example: 12 (The unit column contains a 2, which is less than 5, so round down) becomes 10 15 (The unit column contains a 5, which is 5 or above, so round up) becomes 20