Respuesta :
51.7 rouded would be 50 and 9 is closer to 10 so 50 times 10 is 500
51.7 -> 50
9 -> 10
(keep in mind that I'm rounding to the nearest 10 ok?)
50
X 10
-----------
00
+ 500
------------
500
51.7 x 9= 500 (estimated)
9 -> 10
(keep in mind that I'm rounding to the nearest 10 ok?)
50
X 10
-----------
00
+ 500
------------
500
51.7 x 9= 500 (estimated)