(-23).(-3).(+4).(-7)
2.8.(-14).(-3)
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(-23).(-3).(+4).(-7)
=69.4.(-7)
=276.(-7)
=-1932
2.8.(-14).(-3)
=16.(-14).(-3)
=(-224).(-3)
=672
tick nha
A=\(2^2-9^3+4^{-2}.16-2.5^2\)
\(=4-729+1-50=-774\)
B=\(\left(2^3.2\right).\dfrac{1}{2}+3^{-2}.3^2-7.1+5\)
\(B=2^4.\dfrac{1}{2}+1-7+5=8+1-7+5=7\)
C = 2-3 + (52)3.5-3 + 4-3.16 - 2.32 - 105.(\(\dfrac{24}{51}\))0
C = \(\dfrac{1}{8}\) + 56.5-3 + 4-3.42 - 2.9 - 105.1
C = \(\dfrac{1}{8}\) + 53 + \(\dfrac{1}{4}\) - 18 - 105
C = (\(\dfrac{1}{8}\) + \(\dfrac{1}{4}\)) - (105 - 125 + 18)
C = \(\dfrac{3}{8}\) - (-20 + 18)
C = \(\dfrac{3}{8}\) + 2
C = \(\dfrac{19}{8}\)
a,(-23).(-3).(+4).(-7)
= 69.(+4).(-7)
= 276.(-7)
= -1932
b,2.8.(-14).(-3)
= 16.(-14).(-3)
= -224.(-3)
= 672
a, (-23).(-3).(+4).(-7)
= 69.(+4).(-7)
= 276.(-7)
= -1932
b, 2.8.(-14).(-3)
= 16.(-14).(-3)
= -224.(-3)
= 672
Bài 1
a, ( - 23 ) . ( - 3 ) . ( + 4 ) . ( - 7 )
= 69 . 4 . ( - 7 )
= - 1932
b, 2. 8 . ( - 14 ) . ( - 3 )
= 16 . ( - 14 ) . ( - 3 )
= (- 224 ). ( - 3)
= 672
Bài 2 :
a, -53 . 21
-53 . 20 + -53.1
= -1060 + -53
= - 1113
b, 45 . ( - 12 )
= 45 . ( -10 ) + 45 . (-2)
= -450 + -90
= - 540
a) \(\left(-28\right).\left(-3\right).\left(+4\right).\left(-7\right)=\left(+84\right).\left(+4\right).\left(-7\right)=\left(+336\right).\left(-7\right)=\left(-2352\right)\)
b) \(2.8.\left(-14\right).\left(-3\right)=16.\left(-14\right).\left(-3\right)=\left(-224\right).\left(-3\right)=672\)
=-(23.3.4.7)=-1932
=2.8.14.3=672
=-(34+26+91+99)=-250
=82+(-120)=-(120-82)=-38
=20.(-4)+31.(-20)=20.(-4-31)=20.(-35)=-700
=125+/-25/=125+25=150
=26+34=60
=(-275) +115=-160
=(-34)+34=0
=-18.31-28.(-24)=-555+672=114
(-23).(-3).(4).(-7)
=-1932
2.8.(-14).(-3)
=672