B1

a,\(\dfrac{7}{3}\).\(\dfrac{37}{5}\)-\(\dfrac{7}{3}\).\(\dfrac{32}{5}\)

b, 3:+\(\left(-\dfrac{3}{2}\right)^2\)+ \(\dfrac{1}{9}\).\(\sqrt{36}\)

c,\(\left(-2\right)^2\) + \(\sqrt{36}\)-\(\sqrt{9}\)+\(\sqrt{25}\)

d, \(\left(-\dfrac{2}{3}+\dfrac{3}{7}\right)\) : \(\left(-\dfrac{1}{3}+-\dfrac{4}{7}\right):\dfrac{4}{5}\)

B2

a, \(\dfrac{3}{4}\)+\(\dfrac{1}{4}\):x = \(\dfrac{1}{2}\)

b, -8 + 2 . |2x-3| =4

c, |x - \(\dfrac{1}{3}\)|- \(\sqrt{\dfrac{1}{6}}\)=\(\sqrt{\dfrac{1}{9}}\)

thực hiện phép tính (tính hợp lí nếu có thể)

1) \(-0,75.\dfrac{12}{-5}.4\dfrac{1}{6}.\left(-1\right)^2\)

2) \(\dfrac{11}{25}.\left(-24,8\right)-\dfrac{11}{25}.75,2\)

3) \(\left(-\dfrac{3}{4}+\dfrac{2}{7}\right):\dfrac{2}{3}+\left(-\dfrac{1}{4}+\dfrac{5}{7}\right):\dfrac{2}{3}\)

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

5) \(\left(-2\right)^2+\sqrt{36}-\sqrt{9}+\sqrt{25}\)

6) \(\left(-\dfrac{1}{3}\right)^2.\dfrac{4}{11}+\dfrac{7}{11}.\left(-\dfrac{1}{3}\right)^2\)

Thực hiện phép tính:(hợp lý nếu có thể)

a, \(5.\dfrac{5}{27}+\dfrac{7}{23}+0,5.\dfrac{5}{7}+\dfrac{16}{23}+\dfrac{1}{2}\)

b, \(25\dfrac{1}{6}:\dfrac{-4}{5}-45\dfrac{1}{6}:\dfrac{-4}{5}\)

c, \(25.\left(\dfrac{-1}{5}\right)^3+\dfrac{1}{5}-2.\left(\dfrac{-1}{2}\right)^2-\dfrac{1}{2}\)

d, \(-\left(251.3+281\right)+3.251-\left(1-281\right)\)

e, \(\left(0,75-\dfrac{1}{4}\right):\left(-5\right)+\dfrac{1}{15}-\left(-\dfrac{1}{5}\right):\left(-3\right)\)

f, \(\sqrt{\dfrac{4}{81}}:\sqrt{\dfrac{25}{81}}-1\dfrac{2}{5}\)

bài 1: tính

a) \(\dfrac{5^4.20^4}{25^5.4^5}\) b)3,5-\(\left(-\dfrac{2}{7}\right)\) c)\(\left(\dfrac{11}{12}:\dfrac{33}{16}\right).\dfrac{3}{5}\) d)\(15.\left(-\dfrac{2}{3}\right)^2.-\dfrac{7}{3}\) e)\(\left(\dfrac{9}{25}-2.8\right):\left(3\dfrac{4}{5}+0,2\right)\) g)\(\dfrac{21}{47}+\dfrac{9}{45}+\dfrac{26}{47}+\dfrac{4}{5}\) h)\(\dfrac{15}{12}+\dfrac{5}{13}-\dfrac{3}{12}-\dfrac{18}{13}\) j)12.\(\left(-\dfrac{2}{3}\right)^2+\dfrac{4}{3}\) k)\(\dfrac{13}{25}+\dfrac{6}{41}-\dfrac{38}{25}+\dfrac{35}{41}-\dfrac{1}{2}\) l)12,5.\(\left(-\dfrac{5}{7}\right)+1,5.\left(-\dfrac{5}{7}\right)\) m)\(\sqrt{\dfrac{64}{25}}.3\dfrac{1}{2}-\dfrac{3}{5}.3\dfrac{1}{2}\)

a)\(\dfrac{5}{15}+\dfrac{14}{25}-\dfrac{12}{9}+\dfrac{2}{7}+\dfrac{11}{25}\)

b)\(\left(\dfrac{3}{7}-\dfrac{5}{2}-\dfrac{3}{5}\right)-\left(-\dfrac{4}{7}-\dfrac{3}{2}+\dfrac{2}{5}\right)\)

c)\(\left(\dfrac{2}{5}\right)^2+5\dfrac{1}{2}.\left(4,5-2\right)+\dfrac{2^3}{\left(-4\right)}\)

d)\(\left(-\dfrac{1}{2}\right)^2:\dfrac{1}{4}-2.\left(-\dfrac{1}{2}\right)^3\)

e)\(\sqrt{16}.1\dfrac{3}{4}+\dfrac{1}{4}-7\)

f)\(\dfrac{2^9.4^{10}}{8^8}\)

giúp mình với

1, tính

a, \(7\times\sqrt{\dfrac{6^2}{7^2}}-\sqrt{25}+\sqrt{\dfrac{\left(-3\right)^2}{2}}\)

b, \(-\sqrt{\dfrac{64}{49}}-\dfrac{3}{5}\times\sqrt{\dfrac{25}{64}}+\sqrt{0,25}\)

c, \(\sqrt{\dfrac{10000}{5}}-\dfrac{1}{4}.\sqrt{\dfrac{16}{9}}+\sqrt{\dfrac{\left(-3\right)^2}{\left(4\right)}}\)

d, \(\left|\dfrac{1}{4}-\sqrt{0,0144}\right|-\dfrac{3}{2}+\sqrt{\dfrac{81}{169}}\)

Tinh

a) \(\left(-1,25\right).14,7.\left(-8\right)\)

b)\(\dfrac{3}{4}-1\dfrac{1}{6}\)

c)\(\dfrac{-3}{5}.51\dfrac{11}{13}+\dfrac{3}{5}.21\dfrac{11}{13}\)

d)\(\left|\dfrac{-3}{4}\right|.\left|-\dfrac{2}{3}\right|\)

e)\(\dfrac{-3}{5}+5\dfrac{1}{13}-\dfrac{2}{3}+1\dfrac{3}{5}-\dfrac{11}{33}\)

f)\(\dfrac{3}{4}.\sqrt{16}-10.\sqrt{0,81}\)

g)\(\left(\dfrac{3}{4}\right)^3:\left(-\dfrac{3}{8}\right)^3\)

h)\(\dfrac{6^4.15^3}{8.9^3.10^3}\)

GIUP MK T ^ T