390
950
1070
995 to the nearest tens is 1000. When rounding to the nearest tens, you look at the digit in the ones place. If it is 5 or greater, you round up; if it is less than 5, you round down. In this case, the digit in the tens place is 9, which is 5 or greater, so you round up to the nearest tens, which is 1000.
565
2940
93 to the nearest tens = 90
390
907.457 rounded off to nearest tens place is 910. If it were asked to round off to nearest "tenths" place, it would have been 907.5.
1.145 rounded to the nearest tens is zero. To the nearest tenths it is 1.1
950
It is: 90
It is: 150
1070
150
It is: 450
It is: 290