Question

Bài 4 : Tính

a) 4/11 + 5/22     b) 3 - 3/8     c) 9/25 x 5     d) 3/7 : 4

ai giải đầy đủ thì mình sẽ tick là đũng :v

Answer 1

a) \(\dfrac{4}{11}+\dfrac{5}{22}=\dfrac{8}{22}+\dfrac{5}{22}=\dfrac{13}{22}\)

b) \(3-\dfrac{3}{8}=\dfrac{3}{1}-\dfrac{3}{8}=\dfrac{24}{8}-\dfrac{3}{8}=\dfrac{21}{8}\)

c) \(\dfrac{9}{25}\times5=\dfrac{45}{25}=\dfrac{9}{5}\)

d) \(\dfrac{3}{7}\div4=\dfrac{3}{28}\)

Answer 2

a)

= 8/22 + 5/22

= 11/22

= 1/2

b)

= 24/8 - 3/8

= 21/8

c)

= 45/25

= 9/5

d)

= 3/7 x 1/4

= 3/28

:)