6465000
0
No it is not a square number. It's square root is 18.57 rounded.
345 is a whole number already so just write that.
345 will round to 350.
340
To the nearest whole number it is 345
6465000
345 rounded to the nearest tenth is 345. There is no change.
345 rounds to zero.
0
300
300
Take your choice out of: 345, 346, 347, 348 and 349
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.
340
5520