Question

3,8×0,(5) =
15×0,4(4)×4 întregi şi 1/2 =

Answer 1

1. $3.8-0.(5)=\frac{38}{10}-\frac{5}{9}=\frac{342-50}{90}=\frac{292}{90}=3.2(4)$

2. $15*0.4(4)*4\frac{1}{2}=15*\frac{44-4}{90}*\frac{9}{2}=15*\frac{40}{90}*\frac{9}{2}=15*\frac{4}9*\frac{9}2=\frac{540}{18}=30$