\(\frac{\text{30.25.7.8}}{\text{75.8.12.14}}=\frac{\left(30:6\right).\left(25:25\right).\left(7:7\right).\left(8:8\right)}{\left(75:25\right).\left(8:8\right).\left(12:6\right).\left(14:7\right)}=\frac{5..1.1.1}{3.1.2.2}=\frac{5}{12}\)
\(\frac{30\cdot25\cdot7\cdot8}{75\cdot8\cdot12\cdot14}\)=
Xin Online Math giúp em bài này với ạ!
Tính nhanh:\(\frac{6\cdot7\cdot8\cdot9\cdot10\cdot11}{22\cdot20\cdot18\cdot16\cdot14\cdot12}\)
Tính (theo mẫu)
Mẫu:\(\frac{5\cdot6\cdot7\cdot9}{12\cdot7\cdot27}\)=\(\frac{5\cdot6\cdot7\cdot9}{6\cdot2\cdot7\cdot9\cdot3}\)=\(\frac{5}{6}\)
a.\(\frac{3\cdot4\cdot7}{12\cdot8\cdot9}\)=.........................................................................
b.\(\frac{4\cdot5\cdot6}{12\cdot10\cdot8}\)=.......................................................................
c\(\frac{5\cdot6\cdot7}{12\cdot14\cdot15}\)=......................................................................
Tính (theo mẫu)
Mẫu:\(\frac{5\cdot6\cdot7\cdot9}{12\cdot7\cdot27}\)=\(\frac{5\cdot6\cdot7\cdot9}{6\cdot2\cdot7\cdot9\cdot3}\)=\(\frac{5}{6}\)
a.\(\frac{3\cdot4\cdot7}{12\cdot8\cdot9}\).............................................
b.\(\frac{4\cdot5\cdot6}{12\cdot10\cdot8}\)...........................................
c.\(\frac{5\cdot6\cdot7}{12\cdot14\cdot15}\)........................................
(Lưu ý:Dấu chấm là dấu nhân)
\(\frac{8\cdot7\cdot5}{11\cdot8\cdot7}=?\)
Tính nhanh:
A=\(\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+\frac{1}{4\cdot5}+\frac{1}{5\cdot6}+\frac{1}{6\cdot7}+\frac{1}{7\cdot8}\)
tính nhanh ; 0
\(\frac{6\cdot7\cdot12}{18\cdot4\cdot7}\) = ...................
\(\frac{15\cdot7\cdot9}{77\cdot3\cdot18}\) = .....................
( dấu . là dấu x nhé )
\(\frac{170\cdot144}{12\cdot85\cdot8\cdot4}\)chú ý .là*
\(\frac{170\cdot144}{12\cdot85\cdot8\cdot4}\)
