\(\frac{82}{59}+\frac{95}{91}+\frac{36}{59}+\frac{87}{91}=\left(\frac{82}{59}+\frac{36}{59}\right)+\left(\frac{95}{91}+\frac{87}{91}\right)\)

\(=\frac{118}{59}+\frac{182}{91}=2+2=4\)

\(\frac{82}{59}+\frac{95}{91}+\frac{36}{59}+\frac{87}{91}\) \(=\left(\frac{82}{59}+\frac{36}{59}\right)+\left(\frac{95}{91}+\frac{87}{91}\right)=\frac{118}{59}+\frac{182}{92}=2+2=4\)

Đầu bài kiểu j vậy ???????????????

\(\frac{137}{91}-\frac{46}{71}+\frac{117}{71}-\frac{46}{91}\)

\(=\left(\frac{137}{91}-\frac{46}{91}\right)-\left(\frac{46}{71}-\frac{117}{71}\right)\)

\(=\frac{91}{91}-\frac{-71}{71}\)

\(=1-\left(-1\right)=2\)

\(\frac{125}{61}-\frac{22}{39}+\frac{100}{39}-\frac{3}{61}=\left(\frac{125}{61}-\frac{3}{61}\right)+\left(\frac{100}{39}-\frac{22}{39}\right)\)

\(=\frac{122}{61}+\frac{78}{39}=2+2=4\)

hello

\(\frac{112}{39}-\frac{18}{61}+\frac{79}{61}-\frac{34}{39}\)

\(=\left(\frac{112}{39}-\frac{34}{39}\right)+\left(\frac{79}{61}-\frac{18}{61}\right)\)

\(=\frac{78}{39}+\frac{61}{61}\)

\(=2+1\)

\(=3\)

Số đó là 13/18

Bài làm

\(c=\frac{3}{9}x\frac{2}{8}\)

\(c=\frac{1}{3}x\frac{1}{4}\)

\(c=\frac{1}{12}\)

C X 3/9 = 2/8

C = 2/8 : 3/9

C = 1/2

#HOK TỐT

99/17=135/255

9/16=135/240

15/a=135/9a

=>240 =< 9a =< 255

=>9a=243 hoặc 9a=252

=>a=27 hoặc a=28

vậy a=27 hoặc a=28

5/7 + c = 9/5

<=>   c = 9/5 - 5/7

<=> c = 38/35

Vậy :...............

9/4 - 8/9 = 32/36 - 81/36 = -49

d=49/36

\(\frac{4}{6}\)+ y =\(\frac{7}{5}\)

y = \(\frac{7}{5}\)- \(\frac{2}{3}\)

y = \(\frac{21}{15}\)-\(\frac{10}{15}\)

y = \(\frac{11}{15}\)

k cho mk nha

4/6+y=7/5

y=7/5-4/6

y=22/30=11/15

chúc bạn hok tốt