\(\frac{3}{7}\cdot\frac{56}{63}+\frac{3}{7}\cdot\frac{17}{63}\)

\(=\frac{3}{7}\cdot(\frac{56}{63}+\frac{17}{63})\)

\(=\frac{3}{7}\cdot\frac{73}{63}=\frac{3\cdot73}{7\cdot63}=....\)

 Bạn tự tính nhé

  \(\frac{3}{7}\)x \(\frac{56}{63}\) + \(\frac{3}{7}\)x \(\frac{17}{63}\)

= \(\frac{3}{7}\)x \(\left(\frac{56}{63}+\frac{17}{63}\right)\)

= \(\frac{3}{7}\)x   \(\frac{73}{63}\)

= \(\frac{73}{147}\)

là 8 phần 3

21/22*44/17*68/13=21/1*44/1*4*13

=3696/13

\(\frac{21}{22}\)x \(\frac{44}{17}\)x \(\frac{68}{63}\)

= \(\frac{21}{22}\)x \(\frac{176}{63}\)

= \(\frac{8}{3}\)

a) 21/11.22/17.68/63

=21/11.11.2/17.17.4/3.21

=21.11.2.17.4/11.17.3.21

=8/3

b) 5/14.7/13.26/25

=5/2.7.7/13.2.13/5.5

=5.7.2.13/2.7.13.5.5

=1/5

a: =35/17-18/17-9/5+4/5

=1-1=0

b: =-7/19(3/17+8/11-1)

=7/19*18/187=126/3553

c: =26/15-11/15-17/3-6/13

=1-6/13-17/3

=7/13-17/3=-200/39

\(A=\frac{\left(4^2\right)^{17}.64^{36}}{8^{35}.32^{34}}\)

\(A=\frac{\left(2^4\right)^{17}.\left(2^6\right)^{36}}{\left(2^3\right)^{35}.\left(2^5\right)^{34}}\)

\(A=\frac{2^{68}.2^{216}}{2^{105}.2^{170}}=\frac{2^{284}}{2^{275}}=2^9=512\)

a)5*2^2-18:3=20-6=14

b)17*85+15*17-120=17*(120-85+15)=17*20=340

c2^3*17-2^3*14=2^3(17-14)=8*3=24