Sagot :
Bonjour,
A:
4/5 - (7/10 - 5/6)
Priorité aux parenthèses
4/5 -( 42/60 -50/60)
= 4/5 - (-8/60)
= 4/5+ 8/60=
48/60+ 8/60= 56/60 = 23/30
B:
3/18 + 5/11 x 77/15.
3/18 +385/165
priorité à la multiplication
3/18 + 77/33=
3/18 + 7/3=
3/18 + 42/18 = 45/18 = 15/6 = 5/2
A=4/5-(7/10-5/6)
A=4/5-(7x3/10x3 - 5x5/6x5)
A=4/5-(21/30 - 25/30)
A=4/5-(4/30)
A=4/5-(-2/15)
A=4/5+2/15
A=4x3/5x3 + 2/15
A=12/15+2/15
A=14/15
B=3/18. + 5/11 x 77/15
B=3/18. + 5/11 x 7x11/5x3
B=3/18. + 7/3
B=3/18. + 7x6/3x6
B=3/18. + 42/18
B=45/18
B=45:9/18:9
B=5/2
A=4/5-(7x3/10x3 - 5x5/6x5)
A=4/5-(21/30 - 25/30)
A=4/5-(4/30)
A=4/5-(-2/15)
A=4/5+2/15
A=4x3/5x3 + 2/15
A=12/15+2/15
A=14/15
B=3/18. + 5/11 x 77/15
B=3/18. + 5/11 x 7x11/5x3
B=3/18. + 7/3
B=3/18. + 7x6/3x6
B=3/18. + 42/18
B=45/18
B=45:9/18:9
B=5/2
