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Sagot :

1.
a. 3x60 =180min
b.4,5h =4h30min
4x60+30=270min
c.2x60+35=155min
d. 600/60=10min
2.
a. 12/60=0,2h
B.54/60=0,9h
C.1+42/60
=1,7h
D.4+18/60=4,3h

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