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\(A=0,36.350+0,9.45.4+3.20.12\)
\(A=0,36.350+0,36.45+3,6.20\)
\(A=0,36.350+0,36.45+0,36.10.20\)
\(=0,36.\left(350+45+20.10\right)\)
\(A=0,36.595\)
\(A=214,2\)
\(b.12,8.3,2-y:4,6=35,06\)
\(40,96-y:4,6=35,06\)
\(y:4,6=40,96-35,06\)
\(y:4,6=5,9\)
\(y=5,9.4,6\)
\(y=27,14\)
a) \(y\times15+y\times13=560\times45\)
\(y\times\left(15+13\right)=25200\)
\(y\times28=25200\)
\(y=25200:28\)
\(y=900\)
b) \(y\times345-y\times44-y=123600\)
\(y\times\left(345-44-1\right)=123600\)
\(y\times300=123600\)
\(y=123600:300\)
\(y=412\)
a) \(980+y:94=8245\)
\(y:94=7265\)
\(y=7265\times94\)
\(y=682910\)
b) \(45\times y\times36=3240\)
\(45\times y=3240:36\)
\(45\times y=90\)
\(y=90:45\)
\(y=2\)
c) \(3865-y+875=1000\)
\(3865-y=125\)
\(y=3865-125\)
\(y=3740\)
d) \(4788:126\times y=1596\)
\(126\times y=4788:1596\)
\(126\times y=3\)
\(y=\dfrac{3}{126}\)
\(y=\dfrac{1}{42}\)
e) \(24624:y:9=76\)
\(y:9=24624:76\)
\(y:9=324\)
\(y=324\times9\)
\(y=2916\)
(x+350):x+315=92.4-47
1+350:x+315=368-47
350:x+316=321
350:x=321-316
350:x=5
x=350:5
x=70
ok k ủng hộ nha
{ y + 1/3 } + { y + 1/9 } + { y + 1/27 } = 25/27
3y + 1/3 + 1/9 + 1/27= 25/27
3y+ 9/27+3/27+1/27= 25/27
3y + 13/27= 25/27
3y= 12/27
=> y= 4/27
Ta có:
6/45 = 6×4/45×4 = 24/180
5/36 = 5×5/36×5 = 25/180
11/30 = 11×6/30×6 = 66/180
13/20 = 13×9/20×9 = 117/180
\(25\frac{2}{13}-\left(\frac{15}{17}+15\frac{2}{3}\right)=\frac{327}{13}-\left(\frac{15}{17}+\frac{47}{3}\right)\)
\(=\frac{327}{13}-\frac{844}{51}\)
\(=\frac{5705}{663}\)
\(\frac{5}{30}+\frac{15}{90}+\frac{250}{150}+\frac{350}{210}+\frac{45}{270}=\frac{1}{6}+\frac{1}{6}+\frac{5}{3}+\frac{5}{3}+\frac{1}{6}\)
\(=\frac{3}{6}+\frac{10}{3}\)
\(=\frac{1}{2}+\frac{10}{3}\)
\(=\frac{23}{6}\)
\(3\frac{1}{11}.\frac{27}{46}.1\frac{6}{17}.2\frac{4}{9}=\frac{34}{11}.\frac{27}{46}.\frac{23}{17}.\frac{22}{9}\)
\(=\frac{68}{9}.\frac{27}{34}\)
\(=6\)