Question

[Phương Thảo Nguyễn]

Bài 1: Thực hiện phép tính                                        a) \(\frac{3}{5}+\left(-\frac{2}{3}\right)-\left(-\frac{5}{2}\right)\)                           b) \(2\frac{2}{9}:1\frac{1}{9}-\frac{46}{5}:4\frac{3}{5}\)                    c) \(\left(\frac{2}{3}\right)^{^2}+\frac{5}{9}+\left(\frac{2}{3}:\frac{-2}{3}\right)\)              d) \(\frac{5^2\cdot5^3}{\left(-5\right)^4}\)

Answer 1

[Khánh Ngọc]

a. \(\frac{3}{5}+\left(-\frac{2}{3}\right)-\left(-\frac{5}{2}\right)=\frac{3}{5}-\frac{2}{3}+\frac{5}{2}=\frac{73}{30}\)

b. \(2\frac{2}{9}:1\frac{1}{9}-\frac{46}{5}:4\frac{3}{5}=\frac{20}{9}:\frac{10}{9}-\frac{46}{5}:\frac{23}{5}=\frac{20}{9}.\frac{9}{10}-\frac{46}{5}.\frac{5}{23}=2-2=0\)

c. \(\left(\frac{2}{3}\right)^2+\frac{5}{9}+\left(\frac{2}{3}:\frac{-2}{3}\right)=\frac{4}{9}+\frac{5}{9}+\left(\frac{2}{3}.\frac{-3}{2}\right)=1+\left(-1\right)=0\)

d. \(\frac{5^2.5^3}{\left(-5\right)^4}=\frac{5^5}{5^4}=5\)

Answer 2

[ミ★Ƙαї★彡]

a, \(\frac{3}{5}+\left(-\frac{2}{3}\right)-\left(-\frac{5}{2}\right)=\frac{3}{5}-\frac{2}{3}+\frac{5}{2}=\frac{73}{30}\)

b, \(2\frac{2}{9}:1\frac{1}{9}-\frac{46}{5}:4\frac{3}{5}=\frac{20}{9}:\frac{10}{9}-\frac{46}{5}:\frac{23}{5}\)

\(=2-2=0\)

c, \(\left(\frac{2}{3}\right)^2+\frac{5}{9}+\left(\frac{2}{3}:\frac{-2}{3}\right)=\frac{4}{9}+\frac{5}{9}-1=0\)

d, \(\frac{5^2.5^3}{\left(-5\right)^4}=\frac{5.5.5.5.5}{5.5.5.5}=5\)Vì \(\left(-5\right)^4=5^4\)