Bonsoir,
a) [57 x (8 - 3)] - [5 x (4 + 3) - (2 + 7)]
= (57 x 5) - (5 x 12 - 9)
= 285 - (60 - 9)
= 285 - 51
= 234.
b) [5,7 + (4,3 + 2 x (3 + 1))] + [2 x (3 + 7) + 1]
= [5,7 + (4,3 + 2 x 4)] + (2 x 10 + 1)
= (5,7 + 4,3 + 8) + 20 + 1
= 39.
c) [6,4 + [(5 + 3) x 4 - 2] + 2 x (4 + 8) - 3 x 5
= (6,4 + (8 x 4 - 2) + 2 x 12 - 15
= 6,4 + 32 - 2 + 24 - 15
= 45,4.
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Bonsoir,
a) [57 x (8 - 3)] - [5 x (4 + 3) - (2 + 7)]
= (57 x 5) - (5 x 12 - 9)
= 285 - (60 - 9)
= 285 - 51
= 234.
b) [5,7 + (4,3 + 2 x (3 + 1))] + [2 x (3 + 7) + 1]
= [5,7 + (4,3 + 2 x 4)] + (2 x 10 + 1)
= (5,7 + 4,3 + 8) + 20 + 1
= 39.
c) [6,4 + [(5 + 3) x 4 - 2] + 2 x (4 + 8) - 3 x 5
= (6,4 + (8 x 4 - 2) + 2 x 12 - 15
= 6,4 + 32 - 2 + 24 - 15
= 45,4.