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`1/2 xx 1/3 xx 1/4`
`= (1xx1xx1)/(2xx3xx4)`
`= 1/24`
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`1/2 xx 1/3 : 1/4`
`= 1/2 xx 1/3 xx 4`
`= (1xx1xx4)/(2xx3)`
`= 4/6`
`=2/3`
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`1/2 : 1/3 xx1/4`
`= 1/2 xx 3 xx 1/4`
`=(1xx3xx1)/(2xx4)`
`= 3/8`
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`1/2 : 1/3 : 1/4`
`= 1/2 xx 3xx4`
`= 12/2`
`=6`
`1/2xx1/3xx1/4`
`=1/24`
`1/2xx1/3:1/4`
`=1/6xx4`
`=4/6=2/3`
`1/2:1/3xx1/4`
`=1/2xx3xx1/4`
`=3/2xx1/4`
`=3/8`
`1/2:1/3:1/4`
`=1/2xx3xx4`
`=6`
\(x\times\frac{1}{3}+x\times\frac{5}{3}+x\times\frac{2}{3}=5\)
\(x\times\left(\frac{1}{3}+\frac{5}{3}+\frac{2}{3}\right)=5\)
\(x\times\frac{8}{3}=5\)
\(x=5:\frac{8}{3}\)
\(x=\frac{15}{8}\)
\(\dfrac{3\times4\times2\times14}{7\times4\times6}=\dfrac{3\times4\times2\times2\times7}{7\times4\times6}=\dfrac{6\times4\times2\times7}{7\times4\times6}=2\\ \dfrac{21\times18\times3\times4}{2\times6\times7\times9}=\dfrac{3\times7\times9\times2\times3\times2\times2}{2\times6\times7\times9}=\dfrac{3\times2}{1}=6\)
18 x 123 + 9 x 4567 x 2 + 3 x 5310 x 6
= 18 x 123 + 9 x 2 x 4567 + 3 x 6 x 5310
= 18 x 123 + 18 x 4567 + 18 x 5310
= 18 x ( 123 + 4567 + 5310 )
= 18 x 10000
= 180000
Bài 1:
a) \(x.\dfrac{3}{4}=\dfrac{9}{14}\)
\(\Rightarrow x=\dfrac{9}{14}:\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{6}{7}\)
b) \(x:\dfrac{5}{9}=\dfrac{3}{10}\)
\(\Rightarrow x=\dfrac{3}{10}.\dfrac{5}{9}\)
\(\Rightarrow x=\dfrac{1}{6}\)
\(a,x+\dfrac{3}{7}=\dfrac{2}{5}+\dfrac{3}{10}\)
\(x+\dfrac{3}{7}=\dfrac{4}{10}+\dfrac{3}{10}\)
\(x+\dfrac{3}{7}=\dfrac{7}{10}\)
\(x=\dfrac{7}{10}-\dfrac{3}{7}\)
\(x=\dfrac{49}{70}-\dfrac{30}{70}\)
\(x=\dfrac{19}{70}\)
\(b,\dfrac{19}{20}-x=\dfrac{8}{5}-\dfrac{3}{4}\)
\(\dfrac{19}{20}-x=\dfrac{32}{20}-\dfrac{15}{20}\)
\(\dfrac{19}{20}-x=\dfrac{17}{20}\)
\(x=\dfrac{19}{20}-\dfrac{17}{20}\)
\(x=\dfrac{2}{20}\)
\(x=\dfrac{1}{10}\)
#Urushi☕
`(1 xx 2 xx 3 xx 4)/(3 xx 4 xx 5 xx 6)`
`= (1 xx 2)/(5 xx 6)`
`= 2/12`
`= 1/6`
\(3.3.3.3.3.3=3^6=729\)
Học tốt #
Kết bạn nhé !
3 x 3 x 3 x 3 x 3 x 3 = 729 nhé !