bonjour
A = 9/2 - 5/2 x 8/15
9 /2 - 40/30
135/30 - 40 /30
= 95/30 = 19/ 6
B = 5/3 + ( 5 /9 - 1 /6 )
= 5 /3 + ( 10/18 - 3 /18)
= 5/3 + 7 /18
= 30/18 + 7 /18
= 37/18
C = ( 4/5 - 11/3 ) x 25/43
= ( 12/15 - 55 /15 ) x 25/43
= - 43/15 x 25 /43
= - 25/15 = - 5 /3
D = - 7/5 : ( 6 + 1 /5 )
= - 7/5 : ( 30/5 + 1 /5 )
= - 7/5 : 31 /5
= - 7/5 x 5 /31
= - 7/31
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bonjour
A = 9/2 - 5/2 x 8/15
9 /2 - 40/30
135/30 - 40 /30
= 95/30 = 19/ 6
B = 5/3 + ( 5 /9 - 1 /6 )
= 5 /3 + ( 10/18 - 3 /18)
= 5/3 + 7 /18
= 30/18 + 7 /18
= 37/18
C = ( 4/5 - 11/3 ) x 25/43
= ( 12/15 - 55 /15 ) x 25/43
= - 43/15 x 25 /43
= - 25/15 = - 5 /3
D = - 7/5 : ( 6 + 1 /5 )
= - 7/5 : ( 30/5 + 1 /5 )
= - 7/5 : 31 /5
= - 7/5 x 5 /31
= - 7/31