Question

a.1/3 + -1/4 + 2/5.mấy cái dấu gạch này / là cho dấu phân số nha

b.1/3 + -4/5 + 16/12

c.1/2 + 1/6+-1/4 + 1/5

tìm X biết

a. x + 1/9 - 3/5=3/6

b. 3/4 - x + 6/11 = 5/6

c.x-1/3=1/7

d.1/15-x=3/10

e.x-1/24=5/8-1/3

f.4/10-x=-3/20 + 3/5

g.x/4-3/7 + 2/5 = 31/140

h.5/12 + 5/x - 1/8 = 1/2

Answer 1

Câu 1: 

a: \(\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{2}{5}=\dfrac{20-15+24}{60}=\dfrac{29}{60}\)

b: \(\dfrac{1}{3}-\dfrac{4}{5}+\dfrac{4}{3}=\dfrac{5}{3}-\dfrac{4}{5}=\dfrac{25-12}{15}=\dfrac{13}{15}\)

c: \(=\dfrac{1}{2}+\dfrac{1}{6}-\dfrac{1}{4}+\dfrac{1}{5}\)

\(=\dfrac{30}{60}+\dfrac{10}{60}-\dfrac{15}{60}+\dfrac{12}{60}\)

=37/60