1111+2517536251673521735123517338276349-24546575643356435321=

15 x 6= 90

+ 48= 138 nha 

=15/17 x (4/7 + 3/7) - 1/3
=15/17 x 1 - 1/3
=15/17 x (3/3 - 1/3)
=15/17 x 2/3
=30/51

Giải:

150 x\(\frac{4}{3}\):15 + 5 x \(\frac{4}{3}\)- 10 x \(\frac{4}{3}\)

= (150 : 15 + 5 - 10) x \(\frac{4}{3}\)

= (10 + 5 - 10) x \(\frac{4}{3}\)

= 5 x \(\frac{4}{3}\)

= \(\frac{20}{3}\)

Chúc bạn học tốt nhé.

\(\dfrac{9}{4}\times\dfrac{15}{11}+\dfrac{3}{4}:\dfrac{11}{7}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times3\times\dfrac{15}{11}+\dfrac{3}{4}\times\dfrac{7}{11}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times\dfrac{45}{11}+\dfrac{3}{4}\times\dfrac{7}{11}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times\left(\dfrac{45}{11}+\dfrac{7}{11}-\dfrac{8}{11}\right)\)
\(=\dfrac{3}{4}\times4\)
\(=3\)

`9/4xx15/11+3/4:11/7-3/4xx8/11`

`=3/4xx15/11xx3+3/4xx7/11-3/4xx8/11`

`=3/4xx45/11+3/4xx7/11-3/4xx8/11`

`=3/4xx(45/11+7/11-8/11)`

`=3/4xx4`

`=3`

 36-4x9 = 36 - 36 = 0 Vì số nào nhân với 0 thì cũng bằng 0 nên phép tính đó bằng 0

4/15 x 9/16 x 15

= 1/5 x 3/4 x 15

=3/20 x 15

= 9/4

`5/17 xx 21/4 xx 47/15 xx 0`

`= (5/17 xx 21/4) xx  (47/15 xx 0)`

`= (5/17 xx 21/4) xx 0`

`=0`

a) 19,17x25x4=19,17(25x4)=19,17x100=1917

b)1,79x(8x125)=1,79x1000=1790

chúc bạn học tốt