The pier is 200 meters long. each board is 80 centimeters wide. how many boards are in the pier?
1 answer:
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The reciprocal of a fraction 
is the same fraction "upside down" 
.
The reciprocal of a whole number
is "1 over" that number 
.
10/9
11/1 or 11
1/10
The reciprocal of a whole number
10/9
11/1 or 11
1/10