Tính hợp lí
a, 1987 - 200 . 8 + 1005 : 5
b, 3687 + 9541 + 6313
c, 248 : { [ ( 368 + 232 ) : 120 - 3 ] + 122 } + 2006
tính giá trị biểu thức:
a.120-[7.20-(134-110).5]
b.1987-200.8+1005:5
c.387.2694+7305.387+387
d.248:{[(368+232):120-3]+122}+2016
a.120-[7.20-(134-110).5]
=120-(7.20-24.5)
=120-(140-120)
=120-20
=100
b.1987-200.8+1005:5
=1987-1600+201
=588
C, 387.2694+7305.387+387
=387.(2694+7305+1)
=387.10000
3870 000
d,
d.248:{[(368+232):120-3]+122}+2016
=248:{(600:120-3)+122}+2016
=248:(2+122)+2016
=248:144+2016
=2+2016
=2018
tính giá trị biểu thức
a.120-[7.20-(134-110).5]
b.1987-200.8+1005:5
c.387.2694+7305.387+387
d.248:{[(368+232):120-3]+122}+2016
cac ban giup mih voi.ai lam het tat ca mih se tick 3tick[hua do]
thoi han la den chieu thu 31/8/2016
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018
Thực hiện phép tính bằng cách hợp lí:
248:{[ 368+232):120-3]+122}+2011
help me!!!
248 :{[( 368 +232 ): 120 - 3 ] + 122} +2011
= 248 : {[( 600:120 )-3] + 122} + 2011
= 248 :{5-3+122 } +2011
= (248 : 124) + 2011
= 2 + 2011
= 2013
248:{[ 368+232):120-3]+122}+2011
= 248 {[ 600 :120 -3] + 122} + 2011
= 248 :{ 2+122} + 2011
= 2 + 2011
=2013
tính
248:{[(368+232):120-3]+122}+20150
giải giúp mình nhé
thuc hien phep tinh bang cach hop ly(neu co the) a)248:{[(368+232):120-3]+122}+2011 b) -243+(319:314+28:25)
a) 248: {[( 368+232): 120-3]+122}+2011
=248:{[600:120-3]+122}+2011
=> 248:{ 2+122}+2011
=> 248: 124+2011
=> 2+2011
=> 2013
tự luận
thưc hiện phép tính
a, 3.5^2 - 16 :2^2
b 28. 76 + 13 . 28 + 11. 28
c 248 : {[(368+232):120-3]ư+122}Ư+2012
248 : {[(368 + 29x) : 120 - 3]+122} + 2007 = 2009
248 : { [ ( 368 +232 ) : 120 -3 ] + 12 }
mik cần gấp
248:{ [ ( 368+232):120-3 ]+12}
=248:{ [ 600:120-3 ]+12}
=248:{ [ 5-3 ]+12 }
=248:{2+12}
=248:14
=124/7
=124/7
248:{[(368+232):120-3]+12}
=248:{[600:120-3]+12}
=248:{[5-3]+12}
=248:{2+12}
=248:14
=17,714......
=248:{[600:120-3]+12}
=248:{[5-3]+12}
=248:(2+12)
=248:14
=17.71
Tính hợp lí nếu có thể :
a) 1987 - 200 . 8 + 1005 : 5
b) [ 1200 - ( 42 - 2.3 ) 3 ] : 40
a, \(1987-200.8+1005\div5\)
\(=1987-1600+201\)
\(=387+201\)
\(=588\)
a) 1987 - 200 . 8 + 1005 : 5
= 1987 - 1600 + 201
= 588
b) [ 1200 - ( 42 - 2 . 3 ) 3 ] : 40
= [ 1200 - ( 16 - 6 ) 3 ] : 40
= [ 1200 - 103 ] : 40
= [ 1200 - 1000 ] : 40
= 200 : 40
= 5
b,\([1200-(4^2-2.3)^3]\div40\)
\(=[1200-(16-6)^3]\div40\)
\(=(1200-10^3)\div40\)
\(=(1200-1000)\div40\)
\(=200\div40\)
\(=5\)
Hok tốt !!!!!!!!!!!!!!