Bonjour
A= 4/5 - 1/10
A = (4 x 2) / (5x 2) - 1/10
A = 8/10 - 1/10
A = 7/10
B= 2/3 + 1/4
B = (2x 4) / (3 x 4) + (1x 3) / (4 x 3)
B =8/12 + 3/12
B = 11/12
C= 3+ 6/7
C = (3 x 7) / (1x7)+ 6/7
C = 21/7+6/7
C = 28/7
C = (7x4) / (7 x 1)
C = 4
D= 4 × 5/3
D = 20/3
E= 3/7 × 5/2
E= 15/14
F=4/5 ÷ 1/3
F = - 4/5 x 3
F = - 12/5.
