Esercizio n°203
Esercizio n°203
202
(4+2/3)-(3-6/7)-(3-2/3) =
14/3-15/7-7/3 = (7*14-45-49)/21 = 4/21
204
(5/3-1)-(1/3-1/6)+5/10-1 =
= 2/3-1/6-1/2 = (4-1-3)/6 = 0/6 = 0
203)
$\big(\frac{7}{5}+\frac{7}{15}+2\big)-\big(\frac{1}{5}-\frac{1}{3}+\frac{1}{2}\big)$ =
= $ \frac{7}{5}+\frac{7}{15}+2-\frac{1}{5}+\frac{1}{3}-\frac{1}{2}$= (mcm dei denominatori = 30 quindi:
=$\frac{42+14+60-6+10-15}{30}$=
=$\frac{105}{30}$= semplifica dividendo per 15 numeratore e denominatore:
=$\frac{7}{2}$.