340
345 rounded to the nearest tenth is 345. There is no change.
0
To round 345 to the nearest ten, you look at the digit in the tens place, which is 4. Since 4 is less than 5, you keep the tens digit the same and change all digits to the right to zero. Therefore, rounding 345 to the nearest ten gives you 340.
300
853 rounded to the nearest 100: 900. 10853 rounded to the nearest 100: 10900.
340
162.00
345 rounds to zero.
5520
100
100