a,<-34>+11+|-34|+<11>+105;b,64+125.147-47.125;c,360 :12.2+[(11-4)ngux-343].2017ngũ 2018
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a, 105.(17x-34) = 0
=> 17x-34=0
=> 17x=0+34=34
=>x=34:17=2
=>xϵ{2}
b, 121:11-(4x+5):3=4
=>11-(4x+5)=4.3
=>4x-5=11-12
=>4x-5=-1
=>4x=-1+5
=>4x=4
=>x=4:4=1
=>x∈{1}
a: =17-43=-26
b: =-34+34+11-11+105=105
c: \(=64+125\cdot100=12564\)
d: \(=60+\left[7^3-343\right]\cdot2017^{2018}=60\)
\(a,25-(-18)+(-43)\)
=\(25+18+(-43)\)
=\(43+(-43)\)
=\(0\)
\(b,(-34)+11+\left|-34\right|+105\)
=\((-34)+11+34+105\)
=\([(-34)+34]+11+105\)
=\(0+11+105\)
=\(116\)
\(c,64+105+147-47.125\)
=\(64+125+(147-47).125\)
=\(64+125+100.125\)
=\(64+125+12500\)
=\(189+12500\)
=\(12689\)
\(d,360\div12.2+[(11-4)^3-343].2020\)
=\(360\div12.2+(7^3-343).2020\)
=\(360\div12.2+0.2020\)
=\(30.2+0\)
=\(60\)
a)=(-65-35)+(28+172)
=-100+100
=0
b)=34.[-65+(-55)+20)
=34.(-100)
=-3400
c)=168-437-168-105+437
=(168-168)+(-437+437)-105
=0+0-105
-105
a; (-65) + 28 + (-35) + 172
= -(65 + 35) + (28 + 172)
= - 100 + 200
= 100
b; 34.(-65) + (-55).34 + 34.20
= 34.(-65 - 55 + 20)
= 34.(-120 + 20)
= 34.(-100)
= -3400
c; 168 - (437 + 168) + (-105 + 437)
= 168 - 437 - 168 - 105 + 437
= (168 - 168) - (437 - 437) - 105
= 0 - 0 - 105
= -105
\(\dfrac{1}{2}-\left(\dfrac{-16}{7}\right)+\dfrac{4}{5}-\left(\dfrac{-4}{9}\right)+\dfrac{11}{45}+\dfrac{19}{34}+\dfrac{19}{105}=\dfrac{3836}{765}\approx5\)
\(=\dfrac{1}{2}+\dfrac{16}{17}+\dfrac{19}{34}+\dfrac{4}{5}+\dfrac{4}{9}-\dfrac{11}{45}+\dfrac{19}{105}\)
\(=\dfrac{17+32+19}{34}+\dfrac{36+20-11}{45}+\dfrac{19}{105}\)
\(=2+1+\dfrac{19}{105}=3+\dfrac{19}{105}=\dfrac{334}{105}\)
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