a) A=\(\left(\frac{-5}{11}\right).\frac{7}{15}.\left(\frac{11}{-5}\right).\left(-30\right)\)

b) B=\(\left(-\frac{1}{6}\right).\left(\frac{-15}{19}\right).\left(\frac{38}{45}\right)\)

c) C= \(\left(\frac{-5}{9}\right).\frac{3}{11}+\left(\frac{-13}{18}\right).\frac{3}{11}\)

d) D= \(\left(2\frac{2}{15}.\frac{9}{17}.\frac{3}{32}\right):\left(\frac{-3}{27}\right)\)

4.Tinh

a,\(\frac{4^{30}.3^{43}}{2^{53}.27^{15}}\)

b,\(\frac{\left(-27\right)^{10}.16^{25}}{6^{30}.\left(-32\right)^{15}}\)

c,\(\left(\frac{-2}{17}\right)^3.\left(\frac{-17}{35}\right)^3.\left(\frac{35}{3}\right)^3\)

d,\(\frac{3^{31}.25^8-9^{14}.5^{15}}{27^{10}.5^{15}-3^{30}.5^{17}}\)

e,\(2^{^2}+4^{^2}+6^2+..........+24^2\left(1^2+2^2+3^2+....+12^2=650\right)\)

a)A=\(\frac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}\)                b)B=\(\frac{45}{19}-\left(\frac{1}{2}\left(\frac{1}{3}+\left(\frac{1}{4}\right)^{-1}\right)^-\right)^{-1}\)     c)C=\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^{10}.6^{19}-7.2^{29}.27^6}\)

d)D=\(\frac{2^{21}.3^5-4^6.81}{\left(2^2.3\right)^6+8^4.3^5}\)                e) E=\(\left(6^9.2^{10}+12^{10}\right):\left(2^{19}.27^3+15.4^9.9^4\right)\)

f) F=\(\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.24^3+45^6}\)          g)G=\(\frac{\left(\frac{2}{5}\right)^7.5^7+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^2+512}\)         h)H=\(x+\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}\)với x=-1/3

Bài 1 hãy tính

1 . A = \(\frac{9^5.5^7}{45^7}\)

2 .B = \(\left(\frac{2^2.2^3}{4^2.16}\right)^{15}\)\(:\left(\frac{2^6}{16^2}\right)^{10}\)

3 . A= \(\frac{-5.7^5+7^4}{7^6.10-2.7^5}\)

4 . B = \(\frac{10^3+5.10^2.5^3}{-13}\)

5 . A = \(\frac{\left(-0,03\right)^7.2^8}{\left(0,6\right)^7}\)

6 . B= \(\frac{3^7.16^3}{12^5.27^2}\)

7 . A = \(\frac{2^3.\left(0,5\right)^3.3^7}{2.\left(,5\right)^4.3^8}\)

8 . B = \(\left(\frac{-1}{3}\right)^3\)\(.\left(\frac{-1}{3}\right)^2\)\(.\left(\frac{-1}{3}\right)\)

Giúp mik nhé . mik cần ngay

Bài 1: Thực hiện các phép tính dau bằng cách hợp lí

a. \(\frac{11}{225}-\frac{17}{18}-\frac{5}{7}+\frac{4}{9}+\frac{17}{14}\)

b. \(1-\frac{1}{2}+2-\frac{2}{3}+3-\frac{3}{4}+4-\frac{1}{4}-3-\frac{1}{3}-2-\frac{1}{2}-1\)

Bài 2: Tìm x biết

a. \(\frac{11}{13}-\left(\frac{5}{42}-x\right)=-\left(\frac{15}{28}-\frac{11}{13}\right)\)

b. \(\left|x+\frac{4}{15}\right|-\left|-3,75\right|=-\left|-2,15\right|\)

Bài 3: Thực hiện các phép tính sau bằng cách hợp lí nhất

a. \(\left(-\frac{40}{51}\cdot0,32\cdot\frac{17}{20}\right):\frac{64}{75}\)

b. \(-\frac{10}{11}\cdot\frac{8}{9}+\frac{7}{18}\cdot\frac{10}{11}\)

c. \(\frac{3}{14}:\frac{1}{28}-\frac{13}{21}:\frac{1}{28}+\frac{29}{42}-8\)

d. \(-1\frac{5}{7}\cdot15+\frac{2}{7}.\left(-15\right)+\left(-105\right).\left(\frac{2}{3}-\frac{4}{5}+\frac{1}{7}\right)\)

Bìa 4: Tính giá trị của các biểu thức sau

a. \(A=7x-2x-\frac{2}{3}y+\frac{7}{9}y\) với \(x=-\frac{1}{10};y=4,8\)

b. \(B=x+\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}\) với\(x=-\frac{1}{3}\)

Tính giá trị biểu thức:

a. \(\frac{20^5\times5^{10}}{100^5}\)

b. \(\frac{\left(0,9\right)^5}{\left(0,3\right)^6}\)

c. \(\frac{6^3+3\times6^2+3^3}{-13}\)

d. \(\frac{4^6\times9^5+6^9\times120}{8^4\times3^{12}-6^{11}}\)

e. \(\left(2^{-1}+3^{-1}\right):\left(2^{-1}-3^{-1}\right)+\left(2^{-1}\times2^0\right)\times2^3\)

f. \(\left(\frac{-1}{3}\right)^{-1}-\left(\frac{-3}{5}\right)^6+\left(\frac{1}{2}\right)^2:2\)

rút gon

a,\(\frac{2.5^{22}-9.5^{21}}{25^{10}}\)

b,\(\frac{5\left(3.7^{15}-19.7^{14}\right)}{7^{16}+3.7^{15}}\)

c,\(\frac{\left(\left(-2\right)^2\right)^3.\left(-4\right)^2}{\left(-2\right)^3.\left(-2\right)^2}\) 

d,\(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)

e,\(2^3+3.\left(\frac{1}{8}\right)^0-\left(\frac{1}{2^2}\right).4+\left[\left(-2\right)^2:\frac{1}{2}\right].8\)

f,\(\frac{\left(\frac{2}{5}\right)^7.5^5+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^2+512}\)

\(a,\left(-3\right)^{x+3}=-\frac{1}{27}\)

\(b,\left(-6\right)^{2x+2}=\frac{1}{36}\)

\(c,\left(-3\right)^{x+5}=\frac{1}{81}\)

\(d,\left(\frac{1}{9}^x\right)=\left(\frac{1}{27}\right)^6\)

\(e,\left(\frac{4}{9}\right)^x=\left(\frac{8}{27}\right)^6\)

\(f,5^{x+4}-3.5^{x+3}=2.5^{11}\)

\(r,4.3^{x-1}+2.3^{x+2}=4.3^6+2.3^9\)

\(h,\left(\frac{1}{2}-\frac{1}{3}\right).6x+6^{x+2}=6^{10}+6^7\)

nhờ mấy bn giúp mk tối mình nộp rồi