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
= [tex] \frac{56}{7} - \frac{48 - 14}{5} [/tex]
= [tex] \frac{280}{35} - \frac{336 - 98}{35} [/tex]
= [tex] \frac{280}{35} - \frac{238}{35} [/tex]
= [tex] \frac{6}{5} [/tex] <== SIMPLIFIER
