a) 23 + 47 + 53 + 77
= ( 23 + 77 ) + ( 47 + 53 )
= 100 + 100
= 200
b) 223 + 895 + 777 + 115
= ( 223 + 777 ) + ( 895 + 115 )
= 1000 + 1000
= 2000
a,23+47+53+77
=(23+77)+(53+47)
=100+100
=200
b,223+895+777+115
=(223+777)+(895+115)
=1000+1010
=2010
Nhìn cái đề cũng đủ bt tự chế
Mình nhầm chỗ 865 + 115 = 1010 chứ ko phải 1000 nhé :v
a) 23 + 47 + 53 + 77 b) 223 + 895 + 777 + 115
= ( 23 + 77 ) + ( 47 + 53 ) = ( 223 + 777 ) + ( 895 + 115 )
= 100 + 100 = 1000 + 1000
= 200. = 2000
a) 23+ 47 + 53 + 77
= ( 23 + 77 ) + ( 53 + 47 )
= 100 + 100
= 200
b) 223 + 895 + 777 + 115
= ( 223 + 777 ) + ( 895 + 115 )
= 1000 + 1000
= 2000
a) \(23+47+53+77\)
\(=\left(23+77\right)+\left(47+53\right)\)
\(=100+100\)
\(=200\)
b) \(223+895+777+115\)
\(=\left(293+777\right)+\left(895+115\right)\)
\(=1000+1010\)
\(=2010\)
a) 23 + 47 + 53 + 77
= ( 23 + 77 ) + ( 47 + 53 )
= 100 + 100
= 200
b) 223 + 895 + 777 + 115
= ( 223 + 777 ) + ( 895 + 115 )
= 1000 + 1010
= 2010
a) 23+47+53+77
=(23+77)+(47+53)
=100+100
=100x2
=200
b)223+895+777+115
=(223+777)+(895+115)
=1000+1010
=2010
a) 23+ 47 + 53 + 77
= ( 23 + 77 ) + ( 53 + 47 )
= 100 + 100
= 200
b) 223 + 895 + 777 + 115
= ( 223 + 777 ) + ( 895 + 115 )
= 1000 + 1000
= 2000
b) 223 + 895 + 777 + 115
= ( 223 + 777 ) + ( 895 + 115 )
= 1000 + 1000
= 2000
hok tốt
