match

without

tên thật của mị mà :v

\(\dfrac{3}{2}+\dfrac{3}{33}=\dfrac{3}{2}+\dfrac{1}{11}=\dfrac{33}{22}+\dfrac{2}{22}=\dfrac{33+2}{22}=\dfrac{35}{22}\)

\(a,3,27-4,15=-0,88\\ b,-5,5+\left(-2,85\right)=-\left(5,5+2,85\right)=-8,35\\ c,0,67+1,56=2,23\\ d,7,86+\left(-5,3\right)=7,86-5,3=2,56\\ e,4,5-\left(-9,5\right)=4,5+9,5=14\\ f,0,5\times1,5=0,75\\ g,0,25\times0,3=0,075\\ h,-0,5\times3,5=-1,75\)

\(324,82+312,25=637,07\)

\(a,\dfrac{1}{2}=\dfrac{1\times15}{2\times15}=\dfrac{15}{30}\\ \dfrac{2}{3}=\dfrac{2\times10}{3\times10}=\dfrac{20}{30}\\ \dfrac{3}{5}=\dfrac{3\times6}{5\times6}=\dfrac{18}{30}\\ b,\dfrac{2}{3}=\dfrac{2\times4}{3\times4}=\dfrac{8}{12}\\ \dfrac{3}{4}=\dfrac{3\times3}{4\times3}=\dfrac{9}{12}\\ \dfrac{7}{12}giữnguyên\)

\(120,5\times38,4+60,6\times120,5+120,5\\ =120,5\times38,4+60,6\times120,5+120,5\times1\\ =120,5\times\left(38,4+60,6+1\right)\\ =120,5\times100\\ =12050\)

\(\dfrac{15}{125}=\dfrac{15:5}{125:5}=\dfrac{3}{25}\)