Sagot :
A= 3.5+1.5 x 5+1
= 3.5+ 7.5 + 1
= 12
B= (3 + 1.5) x (5+1)
= 4.5 x 6
= 27
C= 18 - 15 ÷ 6 - 2
= 18 - 2.5 - 2
= 13.5
D= (18-15) ÷ (6-2)
= 3 ÷ 4
= 0.75
E= 2.4 ÷ 3 + 5 x 1.4
= 0.8 + 7
= 7.8
F= 2.4 ÷ (3+5) x 1.4
= 2.4 ÷ 8 x 1.4
= 0.3 x 1.4
= 0.42