Question

CALCULATI IN MODUL CEL MAI EFICIENT:
A]  $\frac{3}{4}$*1$\frac{3}{5}$+1$\frac{3}{5}$*1$\frac{3}{8}$-1$\frac{1}{2}$*1$\frac{3}{5}$=

B]4$\frac{1}{9}$*$\frac{5}{8}$+3$\frac{5}{9}$*$\frac{5}{8}$+1$\frac{1}{3}$*$\frac{5}{8}$=

Answer 1

A] 3/4x8/5+8/5x11/8-3/2x8/5=
8/5(3/4+11/8-3/2)=
8/5x(6+11-12)/8=
8/5x7/8=7/5

b)37/9x5/8+32/9x5/8+4/3x5/8=
5/8x(37/9+32/9+4/3)=
8/5x(69/9+4/3)=
8/5x(69+12)/9=
8/5x81/9=
8/5x9=72/5