Răspuns:
Explicație pas cu pas:
a)
77*(3/7 + 2/5) = 77*(15/35 + 14/35) = 77*29/35 = 203/5
b)
3*(5 + 1/4 + 17/16) = 3*(80/16 + 4/16 + 17/16) = 3*101/16 = 303/16
c)
7*(2/5 + 3 - 12/5) = 7*(2/5 + 15/5 - 12/5) = 7*5/5 = 7
d)
3/19*(3/7 + 4/7) = 3/19*7/7 = 3/19
e)
2/23*3/5 - 2/5*3/46 = 3/5*(2/23 - 2/46) = 3/5*(2/23 - 1/23) = 3/5*1/23 = 3/115
f)
5*(7/11 + 3/22 - 1/2) = 5*(14/22 + 3/22 - 11/22) = 5*6/22 = 5*3/11 = 15/11
