= 6.7.4.4.3.3.2.5.11
11.2.4.5.3.6.16.2.7.2.3,2
= 1
16
= 6.7.4.4.3.3.2.5.11
11.2.4.5.3.6.16.2.7.2.3,2
= 1
16
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)
tính nhanh ; 0
\(\frac{6\cdot7\cdot12}{18\cdot4\cdot7}\) = ...................
\(\frac{15\cdot7\cdot9}{77\cdot3\cdot18}\) = .....................
( dấu . là dấu x nhé )
\(\frac{30\cdot25\cdot7\cdot8}{75\cdot8\cdot12\cdot14}\)=
Các bạn giúp mình nhé!
\(\frac{30\cdot25\cdot7\cdot8}{75\cdot8\cdot12\cdot14}\)=
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Tính nhanh:
\(\frac{10}{11}:\left(\frac{2}{3\cdot5}+\frac{2}{5\cdot7}+\frac{2}{7\cdot9}+\frac{2}{9\cdot11}\right)\)
Tính nhanh:
\(\frac{10}{11}:\left(\frac{2}{3\cdot5}+\frac{2}{5\cdot7}+\frac{2}{7\cdot9}+\frac{2}{9\cdot11}\right)\)
Tính tổng sau bằng cách hợp lí : A = \(\frac{1}{2\cdot5}+\frac{1}{5\cdot8}+\frac{1}{8\cdot11}+...+\frac{1}{17\cdot20}\)
Tính nhanh:
A=\(\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+\frac{1}{4\cdot5}+\frac{1}{5\cdot6}+\frac{1}{6\cdot7}+\frac{1}{7\cdot8}\)