First of all 'to the nearest tens' means that it has to be rounded up or down. Usually the method used is: if it is greater than 5 go to the next ten or if it is less than or equal to 5 stay at that ten.
Example as above:
956
6 is greater than 5 so go to the next ten which is 60 therefore the answer is:
960
But if the example was
955
5 is obviously less than or equal to 5 so we stay at the ten which is 50 therefore the answer is:
950
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: 440
It is: 150
1070
150
It is: 290
It is: 50