a,2/11:1/3x3/2
=6/11x3/2
=9/11
b,15/24+3/4-1/6
=11/8-1/6
=29/24
c,5/2x1/3+1/5
=5/6+1/5
=31/30
d,\(2\dfrac{3}{8}\)-\(1\dfrac{1}{4}+5\dfrac{1}{3}\)
=19/8-5/4+16/3
=9/8+16/3
=155/24
e,7/13x5/14x39/15
=5/26x39/15
=1/2
f,[5/2+1/4]:[1-1/3]
=11/4:2/3
=33/8
g,18/13x[9/4-2/5]x1/2
=18/13x37/20x1/2
=333/130x1/2
=333/260
2/11 : 1/3 x 3/2 = 9/11
15/24 + 3/4 - 1/6 = 29/24
5/2 x1/3+ 1/5 = 31/30
2 và 3/8 - 1 và 1/4 + 5 và 1/3 ? là sao ?
7/13 x 5/14 x 39 /15 = 1/2
[ 5/2 + 1/4 ] : [ 1 - 1/3 ] = 11/4 : 2/3 = 33/8
[ 3/4 - 1/5 ] x 9/2 - 1/7 = 11/20 x 9/2 - 1/7 = 653/280
18/13 x [ 9/4 - 2/5 ] 1/2 ... x 1/2 à
\(\dfrac{2}{11}:\dfrac{1}{3}x\dfrac{3}{2}=\dfrac{6}{11}x\dfrac{3}{2}=\dfrac{9}{11}\)
\(\dfrac{15}{24}+\dfrac{3}{4}-\dfrac{1}{6}=\dfrac{11}{8}-\dfrac{1}{6}=\dfrac{29}{24}\)
\(\dfrac{5}{2}x\dfrac{1}{3}+\dfrac{1}{5}=\dfrac{5}{6}+\dfrac{1}{5}=\dfrac{31}{30}\)
\(2\dfrac{3}{8}-1\dfrac{1}{4}+5\dfrac{1}{3}=\dfrac{19}{8}-\dfrac{5}{4}+\dfrac{16}{3}=\dfrac{9}{8}+\dfrac{16}{3}=\dfrac{155}{24}\)
\(\dfrac{7}{13}x\dfrac{5}{14}x\dfrac{39}{15}=\dfrac{5}{26}x\dfrac{39}{15}=\dfrac{1}{2}\)
\(\left[\dfrac{5}{2}+\dfrac{1}{4}\right]:\left[1-\dfrac{1}{3}\right]=\dfrac{11}{4}:\dfrac{2}{3}=\dfrac{33}{8}\)
\(\left[\dfrac{3}{4}-\dfrac{1}{5}\right]x\dfrac{9}{2}-\dfrac{1}{7}=\dfrac{11}{20}x\dfrac{9}{2}-\dfrac{1}{7}=\dfrac{99}{40}-\dfrac{1}{7}=\dfrac{653}{280}\)
\(\dfrac{18}{13}x\left[\dfrac{9}{4}-\dfrac{2}{5}\right]x\dfrac{1}{2}=\dfrac{18}{13}x\dfrac{37}{20}x\dfrac{1}{2}=\dfrac{330}{130}x\dfrac{1}{2}=\dfrac{330}{260}\)