Question

calculati 3,5 - 1,2(7) - 2/9

Answer 1

3,5=35/10=7/2
$1,2(7)=1 \frac{(27-2)}{90} =1 \frac{25}{90} = \frac{(1*90+25)}{90} = \frac{115}{90} = \frac{23}{18}$

7/2 - 23/18 - 2/9=
Se aduce la numitor comun, 18 :
(7x9-23-2x2)/18=
(63-23-4)/18=
36/18=
2