Răspuns:
Explicație pas cu pas:
4a)=-1+3=2
b) -3·4-6=-12-6=-18
c)50/8-1/2=25/4-1/2=(25-2)/4-23/4
d)-2+6·7/4=-2+21/2=(21-4)/2=17/2
e)-5/6+1/2·9/5=9/10-5/6=(27-25)/30=2/30=1/15
f)18/5·25/6-1/5=3·25/5-1/5=74/5=14 4/5·
g)15/8·4/30-1/8=1/4-1/8=(2-1)/8=1/8
h)-1/2(9/4-19/6)-1/2=-1/2(9·3-19·2+12)/12=-(27-38+12)/24=-(39-38)/24=-1/24
