Question

Câu 1.Tính

a) 2 + 4/7

b)5/6-3/5

c)3/4 x 5/6

d)8/5 : 8/7

Giups mik nhed.Mik cần gấp!

Answer 1

a) 2 + 4/7=18/7

b)5/6-3/5=7/30

c)3/4 x 5/6=5/12

d)8/5 : 8/7=7/5

Answer 2

a) 2 + 4/7 = \(\dfrac{14}{7}+\dfrac{4}{7}=\dfrac{18}{7}\)

b)5/6-3/5= \(\dfrac{25}{30}-\dfrac{18}{30}=\dfrac{7}{30}\)

c)3/4 x 5/6= \(\dfrac{5}{8}\)

d)8/5 : 8/7= \(\dfrac{8}{5}x\dfrac{7}{8}=\dfrac{56}{40}=\dfrac{7}{5}\)

Answer 3

a,2+4/7=14/7+4/7=18/7

b,5/6-3/5=25/30-18/30=7/30

c,3/4.5/6=5/8

d,8/5:8/7=8/5.7/8=7/5