Bonjour
A = 24/30 -4/30 + 1/30 = 21/30 = 7/10
B= 24/20 - 2/20 = 22/20 = 11/10
( priorité à la multiplication)
C= 24/64 -8/64 +1/64 = 17/64
A=4/5-2/15+1/30
=(24-4+1)/30
=21/30
=(21÷3)/(30÷3)
=7/10
B=6/5-2/5×1/4
=6/5-(2×1)/(5×4)
=6/5-2/20
=6/5-(2÷2)/(20÷2)
=6/5-1/10
=(12-1)/10
=11/10
C=3/8-2/16+1/64
=(24-8+1)/64
=17/64
