Question

Calculati
a) [1,(6)+0,25]:0.(5)+0,1;

b) [0,4•3,(3)-1]:0,(5)+0,1;

Answer 1

a)1,(6)=15/9=5/3
0,25=25/100=1/4
0,(5)=5/9
0,1=1/10
(5/3 + 1/4) × 9/5 + 1/10 =
23/12 × 9/5 + 1/10 =
69/20 + 1/10 =
71/20 =
3,55

b)0,4=4/10=2/5
3,(3)=10/3
(2/5 × 10/3 - 1) × 9/5 + 1/10 =
(4/3 - 1) × 9/5 + 1/10 =
1/3 × 9/5 + 1/10 =
3/5 + 1/10 =
7/10 =
0,7