Bonsoir c'est ma réponse
A=(2,5+2)×(6,5-2)
= 4,5×4,5
=20,25
B=2,2×4+27,15÷3
=8,8×9,05
=17,85
C=15,5÷5×2-3×1,2+2
=(15,5x2)-15-3x1,2+2
=31-15-3x1,2+2
=6,2-3x1,2+2
=6,2-3,6+2
=2,6+2
=4,6
D=3,4×102-3,4×2
=346,8 - 6,8
=340
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Bonsoir c'est ma réponse
A=(2,5+2)×(6,5-2)
= 4,5×4,5
=20,25
B=2,2×4+27,15÷3
=8,8×9,05
=17,85
C=15,5÷5×2-3×1,2+2
=(15,5x2)-15-3x1,2+2
=31-15-3x1,2+2
=6,2-3x1,2+2
=6,2-3,6+2
=2,6+2
=4,6
D=3,4×102-3,4×2
=346,8 - 6,8
=340