If we rounded 3 to the nearest tens, it would be 0.
Number 1 Rule:
If the number is above 5, round up.
5, 6, 7, 8, and 9
If the number is 4 and below, round down.
4, 3, 2, and 1
Since the number is 3, we have to round down to the nearest ten, which is 0.
90
40
400
10
200
130
90
40
400
10
200
10
94000
1000
600
56000
8300