18.5 x ( 2.32 + 5.48 ) - 6.8
= 18.5 x 7.8 - 6.8
= 144.3 - 6.8
= 137.5
7/5 + 8/3 :2
= 7/5 + 8/3 *1/2
= 7/5 + 4/3
= 28/15 +20/15
= 48/15 = 16/5
3/8 * 4/9 = 2/3
\(18,5.\left(2,32+5,48\right)-6,8\)
\(=18,5.7,8-6,8\)
\(=144,3-6,8=137,5\)
\(\frac{7}{5}+\frac{8}{3}:2\)
\(=\frac{7}{5}+\frac{4}{3}=\frac{21}{15}+\frac{20}{15}\)
\(\frac{3}{8}.\frac{4}{9}=\frac{1}{6}\)
18,5 x ( 2,32 + 5,48 ) - 6,8
= 18,5 x 7,8 - 6,8
= 144,3 - 6,8
= 137,5
7/5 + 8/3 :2
= 7/5 + 8/3 x1/2
= 7/5 + 4/3
= 28/15 +20/15
= 48/15 = 16/5
3/8 x 4/9 = 2/3
