Bonsoir,
A = 3/4 - 2/3 : 3/2
= 3/4 -2/3 * 2/3
= 3/4 - 4/6
= 3/4 - 2/3
= 9/12 - 8/12
= 1/12
B = 3/4 - 2/3 x 3/2
3/4 -6/6
=3/4 -1
= 3/4 - 4/4
= -1/4
C = 4/3/1/2 x 3/2
= 4/3 * 2/1 *3/2
= 8/3*3/2
= 24/6
= 4
D = 5 x 1-1/2/3
1-1/2 = 2/2-1/2 = 1/2
= 5 * (1/2) /3
= (5/2)/3
= 5* 1/3
= 5/3