2006-12-30 12:16:15 · 5 answers · asked by KEVIN M C 3 in Science & Mathematics ➔ Mathematics
more than or equal to .5 => round up
less than .5 => round down
for example,
10.49 = 10
19.51 = 20
2006-12-30 12:21:49 · answer #1 · answered by ? 2 · 2⤊ 0⤋
It depends on the situation. In general, though, you have a number that consists of an integer and a decimal portion. Look at the digit immediately to the right of the decimal point. If the digit is a 0, 1, 2, 3, or 4, you round down, and just cut off the number at the decimal point. For example, 8.32 becomes 8, 12.05 becoms 12, and 784.44 becomes 784. If, on the other hand, that digit is a 5, 6, 7, 8, or 9, you round up, and you add 1 to the integer part of the numbers. For example, 8.76 becomes 9, 12.701 becomes 13, and 784.99 becomes 785.
2006-12-30 12:23:59 · answer #2 · answered by DavidK93 7 · 0⤊ 0⤋
5 is always the cut-off point. A number below 5 gets rounded down. A number of 5 or greater, gets rounded up. 5.4 or less, gets rounded down to 5, but 5.5 and above rounds up to 6!
2006-12-30 12:26:09 · answer #3 · answered by Anonymous · 0⤊ 0⤋
suppose you want to multiply 15.8 by 21.3
15.8 is closer to 16 and 21.3 is closer to 21
so the answer obtained by multiplying 16 and 21 will be very close to the answer obtained by multiplying 15.8 and 21.3
the estimate will be 336
2006-12-30 12:23:12 · answer #4 · answered by raj 7 · 0⤊ 0⤋
The first answer is the clearest. Thats exactly what i was about to write.
2006-12-30 12:39:51 · answer #5 · answered by Juliet 2 · 0⤊ 0⤋