Răspunsuri

2014-07-08T18:12:47+03:00
A)
Aducem la acelasi numitor in prima paranteza :140
(12*4/140-7*7/140)*(-6-1/6)
(48-49)/140*(-7/6)
(-1/140)*(-7/6)
1/120
B)
aducem la acelasi numitor in prima paranteza:96
(18+20)/96*3/38-1/8
38/96*3/38-1/8
1/32-1/8
-3/32
C)
3-2:(1/2*1)+1/9
3-1+1/9
2+1/9
(18+1)/9
19/9
D)
(1/4+67/100+5/2)*10/2
(25+67+250)/100*5
342/100*5
324/20
171/10
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