calculez les expressions suivantes en notant les étapes intermédiares
a) 4+5x(-3)
b) (3-5-11)x4
c) -8-7x(-4)
d) -9+(-15) : (-3) +7
a) 4+5x(-3)
b) (3-5-11)x4
c) -8-7x(-4)
d) -9+(-15) : (-3) +7
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=4-15
=-11
b)(-2-11)×4
=-13×4
c)-8×28
-224
d)=24÷4
=6