2013 x 2014 x ( 36 x 47 - 18 x 94 ) =
2013 x 2014 x ( 36 x 47 - 18 x 94 ) = ?
2013 x 2014 x (36 x 47 -18 x94)
=2013 x 2014 x (1692-1692)
=2013 x 2014 x 0
=0
2013 x 2014 x ( 36 x 47 - 18 x 94 )
Câu 4:
2013 x 2014 x ( 36 x 47 - 18 x 94 )
Câu 4:
2013 x 2014 x ( 36 x 47 - 18 x 94 )
2013 x 2014 x ( 36 x 47 - 18 x 94 )
2013 x 2012 x ( 36 x 47 - 18 x 94 ) = ?
2013x2012x(36x47-18x2x47)
=2013x2012x(36x47-36x47)
=2013x2012x0
= 0
2013*2014*(36*47-18*94)=
So Sánh :( giải thích lí do )
a) 47/32 và 36/46
b) 199/200 và 200/201
c) 2012 x 2010/2011 x 2011 và 2013 x 2009/2014 x 2008
a) \(\frac{47}{32}>\frac{36}{46}\)Vì phân số \(\frac{47}{32}>1;\frac{36}{46}< 1\)nên \(\frac{47}{32}>\frac{36}{46}\)
b) \(\frac{199}{200}< \frac{200}{201}\)Vì \(\frac{199}{200}=\frac{199.201}{200.201};\frac{200}{201}=\frac{200.200}{201.200}\)
ta so sánh 199.201 và 200.200
199.201 = 199.(200+1) = 199.200+199
200.200 = 200.(199+1) = 200.199+200
Vì 199.200 + 199 < 200.199+200 nên \(\frac{199}{200}< \frac{200}{201}\)
c) \(\frac{2012.2010}{2011.2011}=\frac{\left(2011+1\right).2010}{2011.\left(2010+1\right)}=\frac{2011.2010+2010}{2011.2010+2011}\)
\(\frac{2013.2009}{2014.2008}=\frac{2013.\left(2008+1\right)}{\left(2013+1\right).2008}=\frac{2013.2008+2013}{2013.2008+2008}\)
ta so sánh : \(\frac{2010}{2011}< \frac{2013}{2008}\) vì \(\frac{2010}{2011}< 1;\frac{2013}{2008}>1\)
2013 * 2014 * (36 *47 -18 *19)