Question

tính

a, 1/2-1/3+1/3-1/4+1/4-1/5

b, 1/3-1/5+1/5-1/7+1/7-1/0

c, 3/4-1/3-1/6

d, 1/2-1/3+1/4-1/6

Answer 1

b)

\(\frac{1}{3}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+\frac{1}{7}-\frac{1}{9}\)

=\(\frac{1}{3}-\frac{1}{9}\)

=\(\frac{2}{9}\)

Ủng hộ mik nhá ^_^

Answer 2

bn ơi 1/0 ko hề có nghĩ đề ra vậy hả

Answer 3

a) 

\(\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}.\)

=\(\frac{1}{2}-\frac{1}{5}\)

=\(\frac{3}{10}\)

b)

\(\frac{1}{3}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+\frac{1}{7}-\frac{1}{10}\)

=\(\frac{1}{3}-\frac{1}{10}\)

=\(\frac{7}{30}\)

c)

\(\frac{3}{4}-\frac{1}{3}-\frac{1}{6}\)

=\(\frac{3}{4}-\left(\frac{1}{3}+\frac{1}{6}\right)\)

=\(\frac{3}{4}-\frac{1}{2}\)

=\(\frac{3}{4}-\frac{2}{4}=\frac{1}{4}\)

d)\(\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{6}\)

= \(\frac{1}{6}+\frac{1}{4}-\frac{1}{6}\)

=\(\left(\frac{1}{6}-\frac{1}{6}\right)+\frac{1}{4}\)

=\(\frac{1}{4}\)

Answer 4

1/0 là 1/9 nha cac bn

Answer 5

a, = 1/2-1/5 

= 5/10-2/10=3/10

b, bn nhìn lại đề nhé

c,= 9/12-4/12-2/12

=1/4

d,=6/12-4/12+3/12-2/12

=1/4

bn nhìn đề câu b nha bn

Answer 6

a = 3/10

b=2/9

c=1/4

d=1/4

Answer 7

b, 1/3-1/9=3/9-1/9=2/9

xong rùi đó bn