Réponses

2013-09-16T17:22:13+02:00
A: 346-15+45
= 331 + 45
= 376

B: 17-12:4+(6+7x3)
= 17 - 3 + (6 + 21)
= 14 + 27
= 41

C:74-2x25+100:4
= 74 - 50 + 25
= 24 + 25
= 49

 
D: 56 sur 7 -  48-14 sur 5 
 \frac{56}{7} -  \frac{48 - 14}{5}
 \frac{280}{35} -  \frac{336 - 98}{35}
 \frac{280}{35} -  \frac{238}{35}
 \frac{6}{5} <== SIMPLIFIER