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\(\frac{3}{22}\times\frac{3}{11}\times22\)
1.\(=\frac{3\times3\times22}{22\times11\times1}\)
\(=\frac{3\times3}{11\times1}\)
\(=\frac{9}{11}\)
2. \(=\frac{9}{242}\times22\)
\(=\frac{198}{242}\)
\(=\frac{9\times2\times11}{2\times11\times11}\)
\(=\frac{9}{11}\)
\(\left(\frac{1}{2}+\frac{1}{3}\right)\times\frac{2}{5}\)
1.\(=\frac{5}{6}\times\frac{2}{5}\)
\(=\frac{5\times2}{3\times2\times5}\)
\(=\frac{1}{3}\)
2.\(\)\(=\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}\)
\(=\frac{1}{5}+\frac{2}{15}\)
\(=\frac{3}{15}+\frac{2}{15}\)
\(=\frac{5}{15}=\frac{1}{3}\)
Have a good day
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a, 3/22 x 3/11 x 22
Cách 1
3/22 x 3/11 x 22 = 9/242 x 22
= 198/242
= 9/11
Cách 2
3/22 x 3/11 x 22 = 3 x 3 x 22/22 x 11 x 1
= 9/11
b,( 1/2 + 1/3) x 2/5
Cách 1
( 1/2 + 1/3 ) x 2/5 = 5/6 x 2/5
= 10/30
= 1/3
Cách 2
( 1/2 +1/3) x 2/5 = 1/2 x 2/5 + 1/3 x 2/5
= 2/10 + 2/15
= 1/5 + 2/15
= 3/15 + 2/15
= 5/15
= 1/3
c, 3/5 x 17/21 + 17/21 x 2/5
Cách 1
3/5 x 17/21 + 17/21 x 2/5 = 51/105 + 34/105
= 85/105
= 17/21
Cách 2
3/5 x 17/21 + 17/21 x 2/5 = 17/21 x (3/5 +2/5)
= 17/21 x 5/5
= 17/21 x 1
= 17/21
HỌC TỐT ( k mk nhé)
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2/3 * 10/21 * 3/2 = (2/3 * 3/2) * 10/21 = 1 * 10/21 = 10/21
22/5 * 12 * 5/12 = 22/5 * (12 * 5/12) = 22/5 * 5 =22
7/2 * 28/81 * 2/7= (7/2 * 2/7) * 28/81 = 1 * 28/81 =28/81
5/17 * 21/4 * 47/15 * 0 = 0
~Study well~
#Seok_Jin#
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a: \(=\dfrac{3}{22}\cdot22\cdot\dfrac{3}{11}=3\cdot\dfrac{3}{11}=\dfrac{9}{11}\)
b: \(=\dfrac{5}{6}\cdot\dfrac{2}{5}=\dfrac{1}{3}\)
c: =17/21(3/5+2/5)=17/21
C1: 3/22 x 3/11 x 22
= 9 x 22/22 x 11 = 198/242=9/11
C2: 3/22 x 3/11 x 22
= 3 x 3 x 22/22 x 11 x 1 = 3 x 3/ 11 x 1 = 9/11