345 rounded to the nearest ten is 350.
400
345 rounded to the nearest 10 is 350
345 rounds to zero.
345 rounded to the nearest tenth is 345. There is no change.
840
340
345 rounded to the nearest 10 is 350
345 rounds to zero.
345 rounded to the nearest tenth is 345. There is no change.
0
840
340
300
5520
700
6465000
8 is already rounded to the nearest 10th. Rounded to the nearest 10 is 10.
10