Question

help me plssssssssss

Answer 1

Bài 1:
\(\dfrac{7}{8}+\dfrac{3}{5}:2\)                                                  \(\dfrac{4}{5}:\dfrac{1}{3}+\dfrac{2}{3}\)
= \(\dfrac{7}{8}+\dfrac{3}{5}.\dfrac{1}{2}\)                                               = \(\dfrac{4}{5}.\dfrac{3}{1}+\dfrac{2}{3}\)
= \(\dfrac{7}{8}+\dfrac{3}{10}\)                                                  = \(\dfrac{12}{5}+\dfrac{2}{3}\)
= \(\dfrac{35}{40}+\dfrac{12}{40}\)                                                = \(\dfrac{36}{15}+\dfrac{10}{15}\)
= \(\dfrac{47}{40}\)                                                          = \(\dfrac{46}{15}\)

Answer 2

bài 1

a) 7/8 + 3/5 : 2

= 7/8 + (3/5 : 2)

= 7/8 + 3/10

= 23/40

b) 4/5 : 1/3 + 2/3

= 12/5 + 2/3 

= 46/15