The decimal 82.2 is 82 when rounded to the nearest point.
800
800
822
It ends in 2, so it is rounded down to 820.
820
822 the nearest ten
2786.000
51.54 is 50.00 when rounded to the nearest ten.
863.00
It is 0.0 : the zero after the decimal point is an indication that the number is rounded to the nearest tenth.
132.7
2.6