60
2840. But round to the nearest ten is 2830.
The nearest ten is zero. Rounded up, it's 10
490
170 is already at the nearest ten. It will round up to 200 to be to the nearest 100.
115 rounded to the nearest ten is 120
The nearest ten to 7 is 10.
The answer depends on the extent of rounding. To the nearest ten, it is 10. To the nearest hundred (or larger unit) it is 0.
To the nearest ten cents it will round up to give 67.20 as your answer. It would round down to 67 for the nearest dollar.
7890
1350
To the nearest ten, 42870 TO the nearest hundred, 42900 To the nearest thousand, 43000