Question

Tính bằng hai cách:

a) \(\dfrac{7}{11}:\dfrac{3}{5}+\dfrac{4}{11}:\dfrac{3}{5}\);                          b) \(\left(6,24+1,26\right):0,75\).

Answer 1

/:)))

???

Jjj

 

Answer 2

a) \(\dfrac{3}{5}:\left(\dfrac{7}{11}+\dfrac{4}{11}\right)=\dfrac{3}{5}.1=\dfrac{3}{5}\)

 c2: \(\dfrac{7}{11}:\dfrac{3}{5}+\dfrac{4}{11}:\dfrac{3}{5}=\dfrac{7}{11}.\dfrac{5}{3}+\dfrac{4}{11}.\dfrac{5}{3}=\dfrac{3}{5}\)

 

Answer 3

a) 

C1: \(\dfrac{7}{11}:\dfrac{3}{5}+\dfrac{4}{11}:\dfrac{3}{5}=\left(\dfrac{7}{11}+\dfrac{4}{11}\right):\dfrac{3}{5}=1:\dfrac{3}{5}=\dfrac{5}{3}\)

Answer 4

a) 

C2: \(\dfrac{7}{11}:\dfrac{3}{5}+\dfrac{4}{11}:\dfrac{3}{5}=\dfrac{7}{11}\cdot\dfrac{5}{3}+\dfrac{4}{11}\cdot\dfrac{5}{3}=\dfrac{35}{33}+\dfrac{20}{33}=\dfrac{55}{33}=\dfrac{5}{3}\)

Answer 5

b)

C1: \(\left(6,24+1,26\right):0,75=7.5:0.75=10\)

Answer 6

b)

C2: \(\left(6.24+1.26\right):0.75=6.24:0.75+1.26:0.75=8.32+1.68=10\)

Answer 7

b) cách 1

7,5:0,75=10

Cách 2

8,32*1,68