Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(67-\left[8+7.3^2-24:6+\left(9-7\right)^3\right]:15\\ =67-\left[8+7.9-4+2^3\right]:15\\ =67-\left[8+63-4+8\right]:15\\ =67-75:15\\ =67-5=62\)
`a,`
`31/23-(7/32+8/23)`
`=31/23-7/32-8/23`
`=(31/23-8/23)-7/32`
`=1-7/32=25/32`
`b,`
`38/45-(8/45-17/51-3/11)`
`=38/45-8/45+17/51+3/11`
`= (38/45-8/45)+17/51+3/11`
`=2/3+17/51+3/11`
`=1+3/11=14/11`
`c,`
`(1/3+12/67+13/41)-(79/67-28/41)`
`= 1/3+12/67+13/41-79/67+28/41`
`= 1/3+(12/67-79/67)+(13/41+28/41)`
`= 1/3+(-1)+1=1/3+(-1+1)=1/3+0=1/3`
`d,`
`1/5+(-1/6)+1/7+(-1/8)+1/9+1/8+(-1/7)+1/6+(-1/5)`
`= (1/5+ -1/5)+(-1/6+1/6)+(1/7+ -1/7)+(-1/8 +1/8)+1/9`
`= 0+0+0+0+1/9=1/9 .`
67-[8+7.\(3^2\)-24:6+\(\left(9-7\right)^3\)]:15
=67-[8+63-4+8]:15
=67-75:15
=67-5
=62
67 -[ 8 + 7 x 32 - 24: 6 + (9 - 7 )3] :15
= 67 -[ 8 + 7 . 32 - 24 : 6 + 23 ] : 15
= 67 - [ 8 + 7 . 9 - 24 : 6 + 8 ] : 15
= 67 - [ 71 - 12 ] : 15
= 67 - 59 : 15
= 8 : 15
=> ko thực hiện đc .
đổi ra thì ta có:
67-[8+7.9-24:6+(9-7)^3]:15
=67-[8+63-4+2^3]:15
=67-[8+63- 4+8]:15
=67-[71-4+8]:15
=67-75:15
=67-5
=62
67 - [ 8 + 7 . 32 - 24 : 6 + ( 9 - 7 )3 ] : 15
= 67 - [ 8 + 7 . 9 - 4 + 23 ] : 15
= 67 - [ 8 + 63 - 4 + 8 ] : 15
= 67-[71-4+8]:15
= 67 - [ 67 + 8 ] : 15
= 67 - 75 : 15
= 67 - 5
= 62
\(67-\left[8+7.3^2-24:6+\left(9-7\right)^3\right]:15\)
\(67-\left[8+7.9-4+2^3\right]:15\)
\(67-\left[8+63-4+8\right]:15\)
\(67-\left[71-11\right]:15\)
\(67-60:15\)
\(67-4\)
\(=63\)
67-\([8+7\times3^2-24:6+\left(9-7\right)^3]:15\)
\(\Leftrightarrow\)67-\([8+63-4+8]\) : 15
\(\Leftrightarrow\)(67- 75):15
\(\Leftrightarrow\)-8 : 15
\(\Leftrightarrow\frac{-8}{15}\)