Question

Tính

a 2/8 + 1/5

b 13 / 7 - 3/5

c 5/9 x 31

d 2/7 + 4/5 : 2/3

nhanh nhanh giúp mình đi mà mình đang cần gấp

Answer 1

9/20

44/35

155/9

52/35

Answer 2

a,\(=\dfrac{9}{20}\)
b,\(=\dfrac{44}{35}\)
c,\(=\dfrac{155}{9}\)
d,\(=\dfrac{52}{35}\)

Answer 3

9/20

44/35

155/9

52/35

Answer 4

dễ ẹt

Answer 5

a,0,45

b,44/35

c,155/9

Answer 6

dễ mà

Answer 7

a)\(=\dfrac{10}{40}+\dfrac{8}{40}=\dfrac{18}{40}=\dfrac{9}{20}\)

b)\(=\dfrac{44}{35}\)

c)\(=\dfrac{5\times31}{9}=\dfrac{155}{9}\)

d)\(=\dfrac{2}{7}+\dfrac{6}{5}=\dfrac{10}{35}+\dfrac{42}{35}=\dfrac{52}{35}\)