75
75.
75
75 tens 75 x 10 = 750
5
The number in question is 75.
70
Because 75 times 10 = 750
310 and 320.
658 to the nearest tens is 660
In the number "75", 7's value is in the "tens", and 5's value is in the "units". Thus, 75 is made up of 7 tens and 5 units.
750