`3/4 xx4/5 +3/4xx8/5-3/4xx7/5`

`=3/4xx(4/5+8/5-7/5)`

`=3/4xx5/5`

`=3/4xx1`

`=3/4`

ღYêᑌ_ ᒪღ

`3/4 xx 4/5 + 3/4 xx 8/5 - 3/4 xx 7/5`

`=3/4 xx (4/5 + 8/5 -7/5)`

`= 3/4 xx 5/5`

`= 3/4 xx 1`

`= 3/4`

8/3

= 8/3

ry4u5

(-4/5+4/3)+(-5/4+14/5)-7/3=-4/5+4/3-5/4+14/5-7/3=(-4/5+14/5)+(4/3-7/3)-5/4=2+(-1)-5/4=1-5/4=-1/4

\(1\dfrac{4}{5}+2\dfrac{5}{7}+3\dfrac{4}{5}+4\dfrac{5}{7}\)

\(\text{=}\left(1\dfrac{4}{5}+3\dfrac{4}{5}\right)+\left(2\dfrac{5}{7}+4\dfrac{5}{7}\right)\)

\(\text{=}1+3+\left(\dfrac{4}{5}+\dfrac{4}{5}\right)+2+4+\left(\dfrac{5}{7}+\dfrac{5}{7}\right)\)

\(\text{=}10+\dfrac{8}{5}+\dfrac{10}{7}\text{=}131\dfrac{1}{35}\)

\(\left(-\dfrac{1}{3}\right)-\dfrac{3}{4}-\left(-\dfrac{1}{5}\right)-\dfrac{1}{4}+\dfrac{4}{5}+\dfrac{1}{3}\)

\(=\left[\left(-\dfrac{1}{3}\right)+\dfrac{1}{3}\right]-\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{1}{5}+\dfrac{4}{5}\right)\)

\(=0-\dfrac{4}{4}+\dfrac{5}{5}\)

\(=0-1+1\)

\(=0\)

=-1/3+1/3-3/4-1/4+1/5+4/5

=-1+1

=0

\(A=\dfrac{4}{3}-\left(\dfrac{5}{3}-\dfrac{3}{4}+\dfrac{5}{18}\right)+\left(\dfrac{9}{4}-\dfrac{8}{3}\right)\\ A=\dfrac{4}{3}-\dfrac{5}{3}+\dfrac{3}{4}-\dfrac{5}{18}+\dfrac{9}{4}-\dfrac{8}{3}\\ A=\left(\dfrac{4}{3}-\dfrac{5}{3}-\dfrac{8}{3}\right)+\left(\dfrac{3}{4}+\dfrac{9}{4}\right)-\dfrac{5}{18}\\ A=-3+3-\dfrac{5}{18}\\ A=-\dfrac{5}{18.}\)

40 nha

5 + 4 x 3 + 4 x 5 + 3

= 5 + 12 + 20 + 3

= 17 + 20 + 3

= 37 + 3 

= 40

5 + 4 × 3 + 4 × 5 +3 = 

 = 5+12+20+3

 = 17+23 

 = 40 

kết quả của câu này là 1/10

k nha bn

\(=\dfrac{3}{4}\times\left(\dfrac{5}{7}+\dfrac{4}{7}+5\right)\)

\(=\dfrac{3}{4}\times\dfrac{44}{7}=\dfrac{33}{7}\)