ex 6 te rog ???
si 1 dar nu trebuie in ordine
Răspunsuri la întrebare
Explicație pas cu pas:
6. a)1/5•14/3•30/14=14/15•30/14=2
c) 72/11(5/24+7/18)=72/11•5/24+72/11•7/18=15/11+28/11=43/11
b)7/5(29/7-43/14)=7/5(58/14-43/14)=7/5•15/14=3/2
d)(14/7+16/7)(6/45-1/60)=30/7(24/180-3/180)=30/7•21/180=30/7•7/60=1/2
e)8•5/16•4/25-(9/60-8/60)•6= 5/2•4/25-1/60•6=2/5-1/10=4/10-1/10=3/10
f)(15/48+10/48)•72/15+7/3•4/21=25/48•72/15+4/9=5/2•3/3==5/2•1=5/2
g) (3/56+3/56•14)/(9/2)=(3/56+52/56)/(9/2)=55/56•2/9=495/252=165/84=55/28
h)14/3(15/54-12/54)/[(10/7+1/14)•7/3]=(14/3•3/54)/[(20/14+1/14)•7/3]=(7/1•1/27)/(21/14•7/3)=(7/27)/(7/2)=7/27•2/7=2/27
1.a)1/2•4=2
b)3/5•25=15
c)7/12•3/14=1/8
d)11/5•1/2=11/10
e) 14/3•1/7=2/3
f)15•8/3=40
g)7/3•9/7=3
h)31/10•1/10=31/100
i)12:6/5=12•5/6=10
j)11/2:33/4=11/2•4/33=2/3
k)7:14/3=7•3/14=3/2
l)26/6:13/6=26/6•6/13=2
m)18/7:6/7=18/7•7/6=3
n)21/5:3/25=21/5•25/3=35
o)49/13:53/26=49/13•26/53=98/53