Question

calcule:
a)
\frac{1}{2} + \frac{3}{7}
2
1
​
+
7
3
​

b)
- \frac{2}{3} + \frac{4}{9}−
3
2
​
+
9
4
​

c)
\frac{5}{3} + \binom { - 1 } {2}
3
5
​
+(
2
−1
​
)

d)
- \frac{1}{3} + ( - 1)−
3
1
​
+(−1)
​​

Answer 1

Desculpe não entendi...