Question

bài 1: tính nhanh

a, 5 3/4 : 5/6 - 3 3/4 : 5/6                                                      b, 4/5 x 22/47 + 25/47 : 5/4

Ai làm nhanh mình tik, giải rõ bài trên giúp mình, mình đang cần gấp , cảm ơn

Answer 1

a, \(5\frac{3}{4}:\frac{5}{6}-3\frac{3}{4}:\frac{5}{6}\)

\(=\left(5\frac{3}{4}-3\frac{3}{4}\right):\frac{5}{6}\)

\(=2\frac{3}{4}:\frac{5}{6}\)

\(=\frac{11}{4}.\frac{6}{5}\)

\(=\frac{66}{20}\)

\(=\frac{33}{10}\)

b, \(\frac{4}{5}.\frac{22}{47}+\frac{25}{47}:\frac{5}{4}\)

\(=\frac{4}{5}.\frac{22}{47}+\frac{25}{47}.\frac{4}{5}\)

\(=\frac{4}{5}.\left(\frac{22}{47}+\frac{25}{47}\right)\)

\(=\frac{4}{5}.1\)

\(=\frac{4}{5}\)

Answer 2

a) 5\(\frac{3}{4}\) :  \(\frac{5}{6}\) -  3\(\frac{3}{4}\) :  \(\frac{5}{6}\)

= (  5\(\frac{3}{4}\) -  3\(\frac{3}{4}\) )  : \(\frac{5}{6}\) 

= 2 : \(\frac{5}{6}\)  =  \(\frac{12}{5}\)

b)  \(\frac{4}{5}\) x   \(\frac{22}{47}\)+   \(\frac{25}{47}\) : \(\frac{5}{4}\) 

=  \(\frac{4}{5}\) x \(\frac{22}{47}\) +  \(\frac{25}{47}\) x \(\frac{4}{5}\)

= \(\frac{4}{5}\) x ( \(\frac{22}{47}\) +  \(\frac{25}{47}\) )

=   \(\frac{4}{5}\) x    1 = \(\frac{4}{5}\)

Answer 3

\(a,5\frac{3}{4}\div\frac{5}{6}-3\frac{3}{4}\div\frac{5}{6}=\frac{23}{4}\cdot\frac{6}{5}-\frac{15}{4}\cdot\frac{6}{5}\)

                                                    \(=\left(\frac{23}{4}-\frac{15}{4}\right)\cdot\frac{6}{5}\)

                                                    \(=\frac{8}{4}\cdot\frac{6}{5}\)

                                                      \(=\frac{8\cdot6}{4\cdot5}=\frac{12}{5}\)

\(b,\frac{4}{5}\times\frac{22}{47}+\frac{25}{47}\div\frac{5}{4}=\frac{4}{5}\times\frac{22}{47}+\frac{25}{47}\times\frac{4}{5}\)

                                                   \(=\left(\frac{22}{47}+\frac{25}{47}\right)\times\frac{4}{5}\)

                                                   \(=\frac{47}{47}\times\frac{4}{5}=\frac{4}{5}\)

Tk mh nhé , mơn nhìu !!!

~ HOK TỐT ~