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\(A=\frac{4\cdot0,125\cdot20,2\cdot800\cdot0,25}{1,01\cdot75+0,26\cdot101-1,01}\)
\(=\frac{4\cdot0,25\cdot0,125\cdot800\cdot20,2}{1,01\cdot75+0,26\cdot100\cdot1,01-1,01}\)
\(=\frac{1\cdot100\cdot20,2}{1,01\cdot\left(75+26-1\right)}\)
\(=\frac{100\cdot20,2}{100\cdot1,01}\)
= 20
\(B=\left(\frac{178}{179}+\frac{179}{180}+\frac{180}{181}\right)\cdot\left(\frac{80}{56}-\frac{15}{12}:\frac{7}{8}\right)\)
\(=\left(\frac{178}{179}+\frac{179}{180}+\frac{180}{181}\right)\cdot\left(\frac{10}{7}-\frac{5}{4}\cdot\frac{8}{7}\right)\)
\(=\left(\frac{178}{179}+\frac{179}{180}+\frac{180}{181}\right)\cdot\left(\frac{10}{7}-\frac{10}{7}\right)\)
\(=\left(\frac{178}{179}+\frac{179}{180}+\frac{180}{181}\right)\cdot0\)
= 0
a)\(\frac{5}{12}:\frac{2}{5}+\frac{7}{12}:\frac{2}{5}-\frac{1}{3}:\frac{2}{5}=\left(\frac{5}{12}+\frac{7}{12}-\frac{1}{3}\right):\frac{2}{5}=\frac{2}{3}:\frac{2}{5}=\frac{5}{3}.\)
b) \(\left(6,7+2,3+5,8\right):1,2=14,8:1,2=\frac{148}{10}:\frac{12}{10}=\frac{148}{12}=\frac{74}{6}=\frac{37}{3}\)
hk tốt!
=25/24 + 35/24 - 5/6
=60/24 - 5/6
=15/6 - 5/6
=15-5/6
=10/6
=5/3
mình chỉ biết í a thôi
c, Lấy 1 trừ cho cả 2 vế
1-2000/2001 = 1/2001
1-2001/2002 = 1/2002
=> 1/2001 > 1/2002
a) 1,5 x 3 + ( 4,5 - 1,5 x 3 )
= 1,5.3 + ( 4,5 - 4,5)
= 1,5.3 + 0
= 4,5
b) \(\frac{15}{17}\).\(\frac{4}{33}\)+\(\frac{15}{17}\).\(\frac{29}{33}\)
\(=\)\(\frac{15}{17}\)\(\left(\frac{4}{33}+\frac{29}{33}\right)\)
=\(=\frac{15}{17}\)\(.1\)
\(=\frac{15}{17}\)
a) 1,5 x 3 + (4,5 - 1,5 x3)
=4,5 + 0
4,5
b) 15/17 x 4/33 + 15/17 x 29/33
= 15/17 x ( 4/33 + 29/33)
= 15/17 x 33/33
=15/17 x 1
= 1517
1/ 2016 x 7 - 7 x 2015
= 7 x (2016 - 2015)
= 7 x 1
= 7
2/ \(\frac{5}{13}\times\frac{26}{25}+\frac{3}{5}\)
\(=\frac{5\times26}{13\times25}+\frac{3}{5}\)
\(=\frac{5\times2\times13}{13\times5\times5}+\frac{3}{5}\)
\(=\frac{2}{5}+\frac{3}{5}\)
\(=1\)
Ủng hộ mk nha ^_-
36 .4 + 29 / 36 .5 - 7
= 36 . 4 + 36 - 7 / 36 .5 - 7
= 36 . ( 4 + 1 ) - 7 / 36 . 5 - 7
= 36 . 5 - 7 / 36 .5 - 7
= 1 ( vì tử số = mẫu số )
A ) 102 x 12 - ( 343 : 7 + 285 )
= 1224 - ( 49 + 285 )
= 1224 - 334
= 890