Toán Lớp 6: a/4.25-12.5+170:10= b/(7+3^3:3^2).4-3 c/12:{400:[500-(125+25.7)]} d/168+{[2.{[2^4+3^2)-256^0]:7^2

Question

Toán Lớp 6:  a/4.25-12.5+170:10= b/(7+3^3:3^2).4-3 c/12:{400:[500-(125+25.7)]} d/168+{[2.{[2^4+3^2)-256^0]:7^2

kimlien · Answer

@minhlong86496     4.25-12.5+170:10     = 100 - 60 + 17     = 57     (7+3^3:3^2).4-3     = 7 + (3^3:3^2 ) . 4 - 3      = 7 + 3 . 4 - 3     = 7 + 12 - 3    = 16   12:{400:[500-(125+25.7)]}   = 12:{400:[500-( 125 + 175 )]}   = 12:{400:[500- 300 ]}   = 12:{400: 200 }   = 12 : 2   = 6   168+{[2.{[2^4+3^2)-256^0]:7^2   = 168+{2.(16 + 9 ) - 1 } : 49   =168+{( 2 . 25  - 1 )}: 49    = 168+ {( 50 - 1 )} : 49    = 168 + 49 : 49    = 168 + 1   = 169

quynhthanhnghi · Answer

a) 4 . 25 - 12 . 5 + 170 : 10   = 100 - 60 + 17   = 40 + 17   = 57   b) ( 7 + 3^3 : 3^2) . 4 - 3   = ( 7 + 3) .1   = 10   c) 12 : { 400 : [ 500 - ( 125 + 25 . 7)]}   = 12 : { 400 : [ 500 - ( 125 + 175 )]}   = 12 : [ 400 : ( 500 - 300 )]   = 12 : ( 400 : 200)   = 12 : 2   = 6   d) 168 + {[ 2 . (2^4 + 3^2) - 256^0]} : 7^2   = 168 + {[ 2 . ( 16 + 9) - 1 ]} : 49   = 168 + ( 2 . 25-1 ) : 49   = 168 + ( 50 - 1) : 49   = 168 + 49 : 49   = 168 + 1   = 169      M&igrave;nh gửi b&agrave;i ạ, cho m&igrave;nh c&acirc;u trả lời hay nhất nha. Ch&uacute;c bạn học tốt , m&igrave;nh cảm ơn.