Sagot :
Bonjour,
Série A
:5/2 + 7/2 = 12/2 = 6
; 1+3/7 = 7/7 +3/7 = 10/7
;5/12+5/9 = 15/36 +20/36 = 35/36
;4-2/3 =12/3 - 2/3 = 10/3
;11/6-5/12 = 22/12 - 5/12 = 17/12
4/3 - 0,3 = 4/3 -0,9/3 = 3,1/3
; 2/3+5/6+2/9 = 12/18 +15/18 +4/18 = 31/18
;4x2/3 = 8/3
Serie B
:7/9 x 15/14 = 5/6 (on simplifie avant)
; 7x1/9 x6/14 = 7/9 *6/14 = 2/6
; (3/7 + 5/2) x2/3 = ( 6/14 + 35/14) * 2/3 = 41/14*2/3 = 82/ 42 = 41/21
;(1/2+2/3) x(5/3 - 3/2) = (3/6 +4/6) ( 10/6 -9/6)
= 10/6 * 1/6 = 10/36 = 5/18
; 5-3x2/9 = 5- 6/9 = 5- 2/3 = 15/13-2/3 = 13/13
Série C
: 7/2-1/3 x 5/6 = 7/2 -5/18 = 63/18-5/18 = 58/18 = 29/9
; 5/3 + 2/3 x5/2 +3/2 = 5/3+10/6 +3/2
= 10/6 +10/6 +15/6 = 35/6
