Question

1.calculati 1/4+ 5/6+7/12, b) 5/36 - 1/12-1/18 ex 2 ) 1/2*3*5 +1/3*5*7+1/2*5*7 please

Answer 1

1. a)$\frac{1}{4}$+$\frac{5}{6}$+$\frac{7}{12}$=$\frac{3+10+7}{12}$=$\frac{20}{12}$=$\frac{5}{3}$ (am simplificat cu 4)
b)$\frac{5}{36} - \frac{1}{12}- \frac{1}{18} = \frac{5-3-2}{36} = \frac{0}{36} =0$
2)$\frac{1}{2} *3*5+ \frac{1}{3} *5*7+ \frac{1}{2} *5*7= \frac{15}{2} + \frac{35}{3} + \frac{35}{2} = \frac{45+70+105}{6} = \frac{220}{6} = \frac{110}{3}$