264 x 45 - 45 x 64
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(=45\times64+45\times34+45\times2\\ =45\times\left(64+34+2\right)\\ =45\times100=4500\)
45 x 64 + 45 x 26 x 45 + 10
= 45 x ( 64 + 26 ) x 45 + 10
= 45 x 90 x 45 + 10
\(\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot128-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)
\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(45\cdot2\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)
\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot\left(90\cdot64-90\cdot64\right)\cdot\left(1995\cdot1996+1997\cdot1998\right)\)
\(=\left(45\cdot46+47\cdot48\right)\cdot\left(51\cdot52-49\cdot48\right)\cdot0\cdot\left(1995\cdot1996+1997\cdot1998\right)\)
\(=0\)
b) (45 x 46 + 47 x 48) x (45 x 128 - 90 x 64) x (2009 x 2010 + 2011 x 2012)
= (45 x 46 + 47 x 48) x (45 x 2 x 64 - 45 x 2 x 64) x (2009 x 2010 + 2011 x 2012)
= (45 x 46 + 47 x 48) x 0 x (2009 x 2010 + 2011 x 2012) = 0
( 51 x 52 - 49 x 48 ) x ( 45 x 128 ) x ( 45 x128 - 90 x 64) x ( 1995 x 1996 x 1997)
= ( 51 x 52 - 49 x 48 ) x ( 45 x 128 ) x ( 5760 - 5760 ) x ( 1995 x 1996 x 1997)
= ( 51 x 52 - 49 x 48 ) x ( 45 x 128 ) x 0 x ( 1995 x 1996 x 1997)
= 0.
#Y/n
a)45*x+28=568 b)648-34*x=444 c)x/24=264(dư 13)
=>45*x=568-28 34*x=648-444 => x:24=251
=>45*x=540 34*x=204 =>x=251*24
=>x=540:45 x=204:34 =>x=6024
=>x=12 x=6
a,45*x+28=568
45*x =568-28
45*x =540
x =540:45
x =12
b,648-34*x=444
34*x =648-444
34*x =204
x =204:34
x =6
c,x:24=264 dư 13
x =264*24 +13
x=6349
=9000 nha bn
cac bn ung ho nhe!
=45 x (264-64)
= 9000