1)Tính nhanh giá trị biểu thức

A=\(\frac{1}{3}-\frac{3}{4}-\left(\frac{-3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)
B=\(\left(\frac{-1}{2}\right)-\left(\frac{-3}{5}\right)+\left(\frac{-1}{9}\right)+\frac{1}{131}-\left(\frac{-2}{7}\right)+\frac{4}{35}-\frac{7}{18}\)

tính nhanh

a) \(\frac{1}{3}-\frac{3}{4}-\left(-\frac{3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)

Tính hợp lý:

\(\frac{1}{3}\)-\(\frac{3}{4}-\left(-\frac{3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)

Tính bằng cách hợp lí

A=\(\frac{1}{3}-\frac{3}{4}-\left(-\frac{3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)

Thực hiện phép tính một cách hợp lí

a/ \(\frac{1}{3}-\left(\frac{-3}{4}\right)-\left(\frac{-3}{5}\right)+\frac{1}{57}-\frac{1}{36}+\frac{1}{15}+\left(\frac{-2}{9}\right)\)

b/ \(-\frac{-1}{3}-\left(-\frac{3}{5}\right)+\left(\frac{-1}{9}\right)+\frac{1}{127}-\frac{7}{18}+\frac{4}{35}-\left(\frac{-2}{7}\right)\)

\(B=\frac{1}{3}-\frac{3}{4}-\left(-\frac{3}{5}\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{5}\)= ?

Tính: a ) \(-3\frac{3}{4}+\frac{-10}{25}+\frac{-6}{12}\)

b) \(-0,6-\frac{-4}{9}-\frac{16}{15}\)

c ) \(\frac{7}{12}-\left(-\frac{1}{15}\right)-\frac{5}{6}+\frac{2}{3}+\left(-\frac{1}{5}\right)\)

Tính

a) \(2\sqrt{\frac{25}{16}}-3\sqrt{\frac{49}{36}}+4\sqrt{\frac{81}{64}}\)

b) \(\left(3\sqrt{2}\right)^2-\left(4\sqrt{\frac{1}{2}}\right)^2+\frac{1}{16}.\left(\sqrt{\frac{3}{4}}\right)^2\)

c) \(\frac{2}{3}\sqrt{\frac{81}{16}}-\frac{3}{4}\sqrt{\frac{64}{9}}+\frac{7}{5}.\sqrt{\frac{25}{196}}\)

Tính

a, A=\(\left(\frac{-40}{51}.0,32.\frac{17}{20}\right).\frac{64}{75}\)

b, B=\(4\frac{5}{9}:\left(\frac{-5}{7}\right)-5\frac{4}{9}:\frac{5}{7}\)

c, C= \(1\frac{5}{7}.15+\frac{2}{9}.\left(-15\right)+105.\left(\frac{-2}{3}+\frac{4}{5}-\frac{1}{7}\right)\)