Bonsoir,
A=
3/8 + 2/8 = 5/8
8/6 + 1/6 = 9/6
(5/8) / (9/6) => (5*6)/ (8*9)
30/72 = 15/36 = 5/12
B)
(1/4 )/(4/3) = (1*3) / (4*4) = 3/16
3/8 +3/16 -1/6 =
6/16 +3/16 -1/6 = 9/16 -1/6
27/48 - 8/48 = 19/48
C)
1/4+ 2/4 = 3/4
3/4 *-1/2 = -3/8
d)
1/4 -1/4 = 0
e)
22/6 + 6/6 -5/6 -12/6 = 11/6
f)
11/3 +1 -5/6 +2
22/6 +6/6 -5/6 +12/6 = 35/6
Priorité aux parenthèses, puis aux multiplications, ou aux divisions, puis soustractions ou additions
Règle des signes:
- *- => +
+ *+ => +
- *+ =>-