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\(\frac{315}{316}\cdot\frac{316}{314}\cdot\frac{316}{315}\cdot\frac{317}{313}=\frac{315.316.316.317}{316.314.315.313}=\frac{1.1.316.317}{1.314.1.313}=\frac{100172}{98282}\)
Ta có : \(\frac{3}{2}\times\frac{4}{5}\times\frac{2}{3}\)
\(=\frac{3}{2}\times\frac{2}{3}\times\frac{4}{5}=1\times\frac{4}{5}\)
\(=\frac{4}{5}\)
a. = ( 5016 + 912 ).37:13:74
= 5928.37:13:74
= 219336:13:74
= 14872:74
= 228
b. = (687.3 + 687.7):(338 + 1036)
= (687.(3+7)):1374
= ( 687.10 ) :1374
= 6870 : 1374
= 5
Nhớ k cho mình nhé! Thank you!!!
( 456 x 11 + 912 ) x 37 : 13 : 74
= ( 5016 + 912 ) x 37 : 13 : 74
= 5928 x 37 : 13 : 74
= 219336 : 13 : 74
= 16872 : 74
= 228
[(315 + 372 ) x 3 + ( 372 + 315 ) x 7 ] : ( 26 x 13 + 74 x 14 )
= ( 687 x 3 + 687 + 7 ) : ( 338 + 1036 )
= 687 x ( 3 + 7 ) : 1374
= 687 x 10 : 1374
= 6870 : 1374
= 5
7256 * 4375 - 725 = 31745000 - 725 = 31744275
3650 + 4375 * 7255 = 3650 + 31740625 = 31744275
OK
\(\frac{19}{13}+\frac{14}{6}+\frac{1}{9}+\frac{4}{6}+\frac{7}{13}+\frac{17}{9}\)
\(=\left(\frac{19}{13}+\frac{7}{13}\right)+\left(\frac{14}{6}+\frac{4}{6}\right)+\left(\frac{1}{9}+\frac{17}{9}\right)\)
\(=\frac{26}{13}+\frac{18}{6}+\frac{18}{9}\)
\(=2+3+2\)
\(=7\)
\(\frac{315}{316}\times\frac{313}{314}\times\frac{316}{315}\times\frac{317}{314}\)
\(=\left(\frac{315}{316}\times\frac{316}{315}\right)\times\left(\frac{313}{314}\times\frac{317}{314}\right)\)
\(=1\times1,006339\)
\(=1,006339\)
#Chúc bạn học tốt !
#k mình nhé ?
a)100-9:(372:3.y-1)-14=83
<=>100-9:(124y-1)-14=83
<=>86-9:(124y-1)=83
<=>9:(124y-1)=3
<=>124y-1=3
<=>124y=4
<=>y=\(\frac{1}{31}\approx0,3223\)
b)7260-120:24.y+924=528,3
<=>8184-5y=528,3
<=>5y=7655,7
<=>y=1531,14
c)2000-52:(615:3:y-15)-14=1984
<=>1986-52:(205:y-15)=1984
<=>52:(205:y-15)=2
<=>205:y-15=26
<=>205:y=41
<=>y=5
d)y+y.1/3+5/18=7/18
<=>4/3y=1/9
<=>y=1/12
e)13/15-(5/21+y)7/12=7/10
<=>7/12.(5/21+y)=1/6
<=>5/36+7/12y=1/6
<=>7/12y=1/36
<=>y=1/21\(\approx\)0,4762
h)y+2.y+3.y+...+10.y=49,5
<=>55y=49,5
<=>y=0,9
i)y.(1975/8.9+1885/9.10+1755/10.11+1579/11.12)=1/24
<=>7991,364899y=1/24
<=>y=33/6329161
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