Question

(-7 supra 4)+6 supra 35+(-31 supra 25)+8 supra 20 +1 supra 25
ajutati-ma

Answer 1

(-4/7)+6/35-30/25+2/5=(-4/7)+6/35-6/5+2/5=(-4/7)+6/35-4/5 amplificãm pe (-4/7) cu 35,pe 6/35 cu 7 si pe 4/5 cu 49
-140/245+56/245-196/245=(-280/245)=(-8/7)

Answer 2

$( - \frac{7}{4} ) + \frac{6}{35} + ( - \frac{31}{25} ) + \frac{8}{20} + \frac{1}{25} = \\ - \frac{7}{4} + \frac{6}{35} - \frac{31}{25} + \frac{8}{20} + \frac{1}{25} = \\ \frac{ - 1225 + 120 - 868 + 280 + 28}{700} = \\ \frac{ -1665 }{700} = - \frac{333}{140}$