\(B=\left(-\dfrac{3}{13}\right)+\dfrac{16}{23}+\left(-\dfrac{10}{13}\right)+\dfrac{5}{11}+\dfrac{7}{23}\)

\(B=\left[\left(-\dfrac{3}{13}\right)+\left(-\dfrac{10}{13}\right)\right]+\left(\dfrac{16}{23}+\dfrac{7}{23}\right)+\dfrac{5}{11}\)

\(B=\left(-1\right)+1+\dfrac{5}{11}\)

\(B=\dfrac{5}{11}\)

a,p là -4/3

n là-1/3

m là 5/3

điểm A biểu diễn \(\dfrac{1}{3}\)

vì các số đó viết đc dưới dạng phân số

-0,33=\(-\dfrac{33}{100}\)

0=\(\dfrac{0}{1}\)

\(3\dfrac{1}{2}=\dfrac{7}{2}\)

0,25=\(\dfrac{1}{4}\)

274 - ( 9x+18)=4

9x+18=274-4

9x+18=270

9x=270-18

9x=252

x=252:9

x=28

442+(418-x)=860

418-x=860-442

418-x=418 

x=418-418

x=0

1. play

2.reads

3.have

4. go 

\(\dfrac{5}{4}-6x=7\dfrac{1}{2}\)

\(\dfrac{5}{4}-6x=\dfrac{15}{2}\)

\(6x=\dfrac{5}{4}-\dfrac{15}{2}\)

\(6x=-\dfrac{25}{4}\)

\(x=-\dfrac{25}{4}:6\)

\(x=\dfrac{-25}{24}\)

x - (-2/5) = 5/7

x=5/7+(-2/5)

x=25/35 + (-14/35)

x=11/35