a,5200
b, -4800
c,-4700
d,52400
e,37
sorry nha,mk ko giải ra đc
bn thông cảm
\(a,\left(5318-46+151\right)-\left(318-146+51\right)\)
\(=5318-46+151-318+146-51\)
\(=5000+100+100=5200\)
\(b,48.154-48.254\)
\(=48.\left(154-254\right)\)
\(=48.\left(-100\right)=-4800\)
a) ( 5318 - 46 + 151 ) - ( 318 - 146 + 51 )
=5318-46+151-318+146-51
=(5318-318)+(151-51)+(-46+146)
=5000+100+100
=5200
b) 48 . 154 - 254 . 48
=48.(154-254)
=48.(-100)
=-4800
c) 47 . ( -69 ) + 31 . ( -47 )
= 47. ( -69 ) + ( -31 ) .47
= 47. [ -69 + (-31)]
= 47.(-100)
=-4700
d) ( -524 ) . [ 23 + ( -45 ) ] + 524 . ( -45 + 123 )
= -524 . (-22)+524.78
= 524.22+524.78
= 524.(22+78)
= 524.100
= 52400
e) ( -5 )3 + 2 . ( -3 )4
= -125 + 2 . 81
= -125 + 162
= 37
\(e,\left(-5\right)^3+2.\left(-3\right)^4\)
\(=-125+2.81=-125+162\)
\(=162-125=37\)
\(d,-524.\left[23+\left(-45\right)\right]+524.\left(-45+123\right)\)
\(=524.\left[-23+45\right]+524.\left(-45+123\right)\)
\(=524.22+524.78\)
\(=574.\left(22+78\right)=574.100=57400\)
\(c,47.\left(-69\right)+31.\left(-47\right)\)
\(=-47.69+31.\left(-47\right)\)
\(=-47.\left(69+31\right)=-47.100=-4700\)
a) Đặt \(A=\left(5318-46+151\right)-\left(318-146+51\right)\)
- Ta có: \(A=\left(5318-46+151\right)-\left(318-146+51\right)\)
\(\Leftrightarrow A=5318-46+151-318+146-51\)
\(\Leftrightarrow A=\left(5318-318\right)+\left(151-51\right)+\left(146-46\right)\)
\(\Leftrightarrow A=5000+100+100\)
\(\Leftrightarrow A=5200\)
Vậy \(A=5200\)
b) Đặt \(B=48.154-254.48\)
- Ta có: \(B=48.154-254.48\)
\(\Leftrightarrow B=48.\left(154-254\right)\)
\(\Leftrightarrow B=48.\left(-100\right)\)
\(\Leftrightarrow B=-4800\)
Vậy \(B=-4800\)
c) Đặt \(C=47.\left(-69\right)+31.\left(-47\right)\)
- Ta có: \(C=47.\left(-69\right)+\left(-31\right).47\)
\(\Leftrightarrow C=47.\left[\left(-69\right)+\left(-31\right)\right]\)
\(\Leftrightarrow C=47.\left(-100\right)\)
\(\Leftrightarrow C=-4700\)
Vậy \(C=-4700\)
d) Đặt \(D=\left(-524.\right).\left[23+\left(-45\right)\right]+524.\left(-45+123\right)\)
- Ta có: \(D=524.-\left[23+\left(-45\right)\right]+524.\left(-45+123\right)\)
\(\Leftrightarrow D=524.\left[-\left(-45+23\right)+\left(-45+123\right)\right]\)
\(\Leftrightarrow D=524.\left(45-23-45+123\right)\)
\(\Leftrightarrow D=524.100\)
\(\Leftrightarrow D=52400\)
Vậy \(D=52400\)
e) Đặt \(E=\left(-5\right)^3+2.\left(-3\right)^4\)
- Ta có: \(E=\left(-5\right)^3+2.\left(-3\right)^4\)
\(\Leftrightarrow E=-125+2.81\)
\(\Leftrightarrow E=162-125\)
\(\Leftrightarrow E=37\)
Vậy \(E=37\)
Các bạn chỉ cho mình là mình sai chỗ nào đi ??????
