\(=\frac{1}{12}+\frac{5}{12}+\frac{3}{16}+\frac{5}{16}\)

\(=\frac{6}{12}+\frac{8}{16}\)

\(=\frac{1}{2}+\frac{1}{2}\)

\(=\frac{2}{2}\)

\(=1\)

\(=\left(\frac{1}{12}+\frac{5}{12}\right)+\left(\frac{3}{16}+\frac{5}{16}\right)\)

=\(\frac{1}{2}+\frac{1}{2}\)

\(=\frac{2}{2}=1\)

= \(\left(\frac{1}{12}+\frac{5}{12}\right)\)+    \(\left(\frac{3}{16}+\frac{5}{16}\right)\)

=   \(\frac{1}{2}\)+    \(\frac{1}{2}\)=   \(\frac{2}{2}\)= 1

Em nến gõ bằng công thức toán học em nhé. Như vậy mọi người nới hiểu đúng đề bài để trợ giúp cho em một cách tốt nhất em ạ!

Đề bài là tính hả bạn?

đi thi rồi dờ đưa lên à

\(a,=\dfrac{17}{12}\\ b,=\dfrac{3}{16}\\ c,=\dfrac{35}{72}\\ d,=\dfrac{3}{2}\)

a)17/12

b)3/16

c)35/72

d)3/2

chúc bạn học tốt nha <3

so easy

Giải giúp tôi

co sai de ko do

cách giải bài này như nào: 5/20+1/4+6/24+8/32=bao nhiêu

    \(\dfrac{4}{5}\) : (\(\dfrac{4}{5}\) .- \(\dfrac{5}{4}\)) : (\(\dfrac{16}{25}\) - \(\dfrac{1}{5}\))

=  \(\dfrac{4}{5}\) : (-1) : (\(\dfrac{16}{25}\) - \(\dfrac{5}{25}\))

= -\(\dfrac{4}{5}\)  : \(\dfrac{11}{25}\)

= - \(\dfrac{4}{5}\) x \(\dfrac{25}{11}\)

=  - \(\dfrac{20}{11}\)

    \(\dfrac{11}{12}\) : (\(\dfrac{7}{9}\) + \(\dfrac{-1}{3}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{5}{15}\))

= \(\dfrac{11}{12}\) : (\(\dfrac{7}{9}\) - \(\dfrac{3}{9}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{1}{3}\))

= \(\dfrac{11}{12}\) : \(\dfrac{4}{9}\) - \(\dfrac{1}{3}\)

= \(\dfrac{11}{12}\) x \(\dfrac{9}{4}\) - \(\dfrac{1}{3}\)

= \(\dfrac{99}{48}\) - \(\dfrac{1}{3}\)

= \(\dfrac{99}{48}\) - \(\dfrac{16}{48}\)

= \(\dfrac{83}{48}\)  

\(\dfrac{4}{5}\): (\(\dfrac{4}{5}\).-\(\dfrac{5}{4}\)) : (\(\dfrac{16}{25}\) - \(\dfrac{1}{5}\))

=\(\dfrac{4}{5}\) x - 1: (\(\dfrac{16}{25}\) - \(\dfrac{5}{25}\))

= - \(\dfrac{4}{5}\) : \(\dfrac{11}{25}\)

= - \(\dfrac{4}{5}\) x \(\dfrac{25}{11}\)

= - \(\dfrac{20}{11}\) 

\(\dfrac{11}{12}\): (\(\dfrac{7}{9}\) + - \(\dfrac{1}{3}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{5}{15}\))

= \(\dfrac{11}{12}\) : (\(\dfrac{7}{9}\) - \(\dfrac{3}{9}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{1}{3}\))

= \(\dfrac{11}{12}\) : \(\dfrac{4}{9}\) - \(\dfrac{1}{3}\)

= \(\dfrac{11}{12}\) x \(\dfrac{9}{4}\) - \(\dfrac{1}{3}\)

= \(\dfrac{99}{48}\) - \(\dfrac{16}{48}\)

= \(\dfrac{83}{48}\) 

- \(\dfrac{2}{5}\).(\(\dfrac{9}{8}\) + \(\dfrac{16}{32}\) - \(\dfrac{3}{4}\)) - \(\dfrac{9}{10}\)

= - \(\dfrac{2}{5}\).(\(\dfrac{9}{8}\) + \(\dfrac{4}{8}\) - \(\dfrac{6}{8}\)) - \(\dfrac{9}{10}\)

= - \(\dfrac{2}{5}\).(\(\dfrac{13}{8}\) - \(\dfrac{6}{8}\)) - \(\dfrac{9}{10}\)

= - \(\dfrac{2}{5}\).\(\dfrac{7}{8}\) - \(\dfrac{9}{10}\)

= - \(\dfrac{7}{20}\) - \(\dfrac{18}{20}\)

= - \(\dfrac{5}{4}\)

\(a,\dfrac{5}{15}+\dfrac{2}{5}\\ =\dfrac{1}{3}+\dfrac{2}{5}\\ =\dfrac{11}{15}\\ b,\dfrac{2}{7}+\dfrac{12}{21}\\ =\dfrac{2}{7}+\dfrac{4}{7}\\ =\dfrac{6}{7}\\ c,\dfrac{16}{24}+\dfrac{5}{12}\\ =\dfrac{8}{12}+\dfrac{5}{12}\\ =\dfrac{13}{12}\)

a, 11/15                                         

b,6/7

c,13/12

a, 11/15                                         

b,6/7

c,13/1

a) Ư (12) = {1;2;3;4;6;12}

Ư (16) = {1;2;4;8;16}

Ư (24) = {1;2;3;4;6;8;12;24}

ƯC (12; 16; 24) = {1;2;4}

b) ƯC (5; 15; 35) = {1;5}

c) BC (8; 12; 24) = {0;24;48}

d) BC (5; 15; 35) = {0;105;210;…}