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![](https://rs.olm.vn/images/avt/0.png?1311)
133 : 7 + 154 : 7 + 413 : 7
= ( 133 + 154 + 413 ) : 7
= 700 : 7
= 100
![](https://rs.olm.vn/images/avt/0.png?1311)
4/6 + 7/18 + 17/9 + 14/6 + 1/9
= 12/18 + 7/18 + 34/18 + 42/18 + 2/18
= ( 34/18 + 2/18 ) + ( 42/18 + 12/18 ) + 7/18
= 36/18 + 54/18 + 7/18
= 97/18
Trl:
\(\frac{4}{6}+\frac{7}{18}+\frac{17}{9}+\frac{14}{6}+\frac{1}{9}\)
\(=\frac{12}{18}+\frac{7}{18}+\frac{34}{18}+\frac{42}{18}+\frac{2}{18}\)
\(=\left(\frac{34}{18}+\frac{2}{18}\right)+\left(\frac{42}{18}+\frac{12}{18}\right)+\frac{7}{18}\)
\(=\left(\frac{36}{18}+\frac{54}{18}\right)+\frac{7}{18}\)
\(=\frac{90}{18}+\frac{7}{18}=\frac{97}{18}\)
#z
![](https://rs.olm.vn/images/avt/0.png?1311)
`a, 6 xx (7-5) = 6 xx 2 = 12`
`6 xx 7 - 6 xx 5 = 42 - 30 = 12`.
`b, 3 xx 5 - 3 xx 4= 3`
` 3 xx (5-4) = 3`
`c, 28 xx (10-1) = 28 xx 9 = 252`
`(100 - 1) xx 36 = 3600 - 36 = 3564`
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(\frac{3}{4}.\frac{8}{5}.\frac{5}{9}=\frac{2}{3}\)
b, \(\frac{6}{7}:\frac{3}{14}:\frac{1}{2}=8\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 325 * 6 + 6 * 560 + 6 * 115
= 6 * ( 325 + 560 + 115 )
= 6 * 1000
= 6000
b) 133 : 7 + 154 : 7 + 413 : 7
= ( 137 + 154 + 413 ) : 7
= 504 : 7
= 72
=(325+560+115):6
= 1000×6
= 6000
#học tốt#