Question

a) 2supra3+1supra2x4supra5 B)7supra3-2supra5:1supra3 d) 0,2+0,3x1,2

Answer 1

a)$\frac{2}{3}+ \frac{1}{ \frac{2*4}{5} } = \frac{2}{3} +1* \frac{5}{8} =16/24+15/24= \frac{31}{24}$
b)7/3-2/5:1/3=7/3-2/5*3=7/3-6/5=35/15-18/15=17/15
c)0,2+0,3*1,2=0,2+0.36=0.56