Question

1. Calculeaza:
a) 14/15+1/3·1/5
b)2/3:4/5-1/3
c)2/5·(1/2+3/4)-0,5
d) (1/2+1/3)·4/5+5/3
e) 2/7+5/7:5+4/7
f) 3/2+5/3·1/10-2/3
Va rog ajutati-ma!!

Answer 1

a) 14/15+1/3·1/5 = 14/15+1/15 = 1
b) 2/3:4/5-1/3 = 2/3*5/4-1/3 = 1/3*5/2-1/3 =5/6-1/3 = 1/2
c) 2/5·(1/2+3/4)-0,5 = 2/5*5/4-1/2 = 1/2-1/2 = 0
d) (1/2+1/3)·4/5+5/3 = 5/6*4/5+5/3 = 1/3*2+5/3 = 2/3+5/3 = 7/3
e) 2/7+5/7:5+4/7 = 2/7+5/7*1/5+4/7 = 2/7+1/7+4/7 = 1
f)  3/2+5/3·1/10-2/3 = 3/2+1/3*1/2-2/3 = 3/2+1/6-2/3 = 1