60
The nearest ten is zero. Rounded up, it's 10
It depends on rounded up to what degree. Rounded up to the nearest ten, it is 0.
You do nothing. 450 is already rounded to the nearest ten.
121195999979 = 121195999980 (rounded to the nearest ten) 100000000000 (rounded to the nearest hundred billion)
It is 3000 rounded UP to the nearest thousand. It is 2600 rounded down to the nearest hundred. It is 2650 rounded UP to the nearest ten.
600
To the nearest ten, 20
To the nearest ten, 20
To the nearest ten, 10
It is: 3240
1350