Bonsoir,qui pourrez m'aider pour mon dm de maths! Merci✌️

I )
a) = 28 ÷ 7 + 3 - ( 12 - 2 × 3 )
= 4 + 3 - ( 12 - 6 )
= 7 - 6
= 1

b) = 43 + 3 × 4 - [ 20 - ( 7 + 2 × 3 ) ]
= 43 + 12 - [ 20 - ( 7 + 6 ) ]
= 55 - [ 20 - 13 ]
= 55 - 7
= 48

c) = 100 - [ 40 - 8 ÷ 2 - 5 + 8 ÷ 2 × 3 ]
= 100 - [ 40 - 16 - 5 + 4 ×3 ]
= 100 - [ 24 - 5 + 12 ]
= 100 - [ 19 + 12 ]
= 100 - 31
= 69

d) = [ 12 ÷ (3 + 1 ) ] × ( 1 + 2 × 4 ) - 1
= [ 12 ÷ 4 ] × ( 1 + 8 ) - 1
= 3 × 9 - 1
= 27 - 1
= 26

II )
D = 5,4 × ( 7,3 + 2,7 )
= 5,4 × 10
= 54

D = 5,4 × ( 7,3 + 2,7 )
= 5,4 × 7,3 + 5,4 × 2,7
= 39,42 + 14,58
= 54

E = 8,5 × ( 100 - 2 )
= 8,5 × 98
= 833

E = 8,5 × 100 - 8,5 × 2
= 850 - 17
= 833