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a) 46 + (-80) + 34
= (46 + 34) - 80
= 80 - 80
= 0
b) 115 - (-85) + 35 - (46 + 35)
= 115 + 85 + 35 - 46 - 35
= (115 + 85) + (35 - 35) - 46
= 200 + 0 - 46
= 154
c) 5. (-9). 2. (-7). (-2020)0
= (5. 2). [(-9). (-7)]. (-2020)0
= 10. 63. 1
= 630
d) 57. (49 - 16) - 57. (24 + 49)
= 57. 49 - 57. 16 - 57. 24 - 57. 49
= 2793 - 912 - 1368 - 2793
= (2793 - 2793) + (-912 - 1368)
= 0 + (-2280)
= -2280
Chúc bạn học tốt!!!
46 + ( -80 ) + 34 = ( 46 + 34 ) - 80 = 80 - 80 = 0
115-(-85)+35-(46+35) = 115 + 85 + 35 - 46 - 35 = ( 115 + 85 ) + ( 35 - 35 ) - 46 = 200 - 46 = 154
5. ( - 9 ).2.(-7).\(^{-2020^0}\) = ( 5.2 ). ( -9 . -7 ) . 1 = 10 . 63 = 630
57 . ( 49 - 16 ) - 57. ( 24 + 49 ) = ( 49-16 - 24 - 49 ) . ( 57 - 57 ) = -40 . 0 = 0
a) (46+34)+(-80)=80+(-80)=0
b)2017\(^0\)=0
=> 5.(-9).2.(-7).(2017\(^0\))=0
c)115+85+35-46-35
=(35-35)+(115+85-46)
=154
d) 57.33-57.73
=57.(33-73)
=57.(-40)=-2280
115-(-85)+35-(46+35)
= 115 + 85 + 35 - 81
= 115 + 35 + 85 - 81
= 150 + 4
= 154
5.(-9).2(-7).(-2020) mũ 0
= 5.(-9).2(-7).1
= 5.2.(-9)(-7)
= 630
57.(49-16)-57.(24+49)
= 57.[(49-16)-(24+49)]
= 57.(49-16-24-49)
=57.(49-49-16-24)
=57.(0-16-24)
=57.(-40)
=-2280
\(P=\dfrac{32}{64}\cdot\dfrac{-57}{19}+\dfrac{35}{21}\cdot\dfrac{22}{44}=\dfrac{1}{2}\left(-3+\dfrac{5}{3}\right)=\dfrac{1}{2}\cdot\dfrac{-4}{3}=\dfrac{-2}{3}\)
\(Q=\dfrac{75}{125}\cdot\dfrac{82}{164}+\dfrac{49}{98}\cdot\dfrac{-35}{105}=\dfrac{1}{2}\left(\dfrac{3}{5}-\dfrac{1}{3}\right)=\dfrac{1}{2}\cdot\dfrac{4}{15}=\dfrac{2}{15}\)
\(46+\left(-80\right)+34=\left(46+34\right)-80=80-80=0\)
\(115-\left(-85\right)+35-\left(46+35\right)=115+85+35-46+35\)
\(=\left(115+85\right)+\left(35-35\right)-46=200+0-46=154\)
\(5\left(-9\right).2.\left(-7\right)\left(-2020\right)^0=\left(-45\right)\left(-14\right).1=630\)
\(57\left(49-16\right)+57\left(24-49\right)=57.49+57.16+57.24-57.49\)
\(=57\left(49-49+16+24\right)=57.40=2280\)