Sagot :
If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).
[tex]9.92\approx9.9\\3.99\approx4\\2.14\approx2.1\\8.39\approx8.4\\2.79\approx2.8\\8.48\approx8.5\\2.96\approx3\\5.34\approx5.3\\4.52\approx4.5[/tex]
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).
[tex]9.92\approx9.9\\3.99\approx4\\2.14\approx2.1\\8.39\approx8.4\\2.79\approx2.8\\8.48\approx8.5\\2.96\approx3\\5.34\approx5.3\\4.52\approx4.5[/tex]
9.92 = 9.90 = 9.9
3.99 = 4.00 = 4
2.14 = 2.10 = 2.1
8.39 = 8.40 =8.4
2.79 = 2.80 =2.8
8.48 = 8.50 = 8.5
2.96 = 3.00 = 3
5.34 = 5.30 = 5.3
4.52 = 4.50 = 4.5