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a) \(\left(-34\right)+\left(-91\right)+\left(-26\right)+\left(-99\right)\)
\(=\left[\left(-34\right)+\left(-26\right)\right]+\left[\left(-91\right)+\left(-99\right)\right]\)
\(=\left(-60\right)+\left(-190\right)\)
\(=-250\)
b) \(125+\left|-25\right|\)
\(=125+25\)
\(=150\)
c) \(\left|-26\right|+\left|-34\right|\)
\(=26+34\)
\(=60\)
d) \(\left|-82\right|+\left(-120\right)\)
\(=82+\left(-120\right)\)
\(=-38\)
e) \(\left(-275\right)+\left|-115\right|\)
\(=\left(-275\right)+115\)
\(=-160\)
f) \(\left(-34\right)+\left|-34\right|\)
\(=\left(-34\right)+34\)
\(=0\)
\(\text{ a, (-34) + (-91) + (-26) + (-99)}\)
\(=\left[\text{(-34) + (-26) }\right]+\left[(-91) + (-99)\right]\)
\(=\left(-60\right)+\left(-190\right)\)
\(=-250\)
\(b,\text{ 125 + |-25| }\)
\(=125+25=150\)
\(\text{c, |-26| + |-34|}\)
\(=26+34=60\)
\(\text{d, |-82| + (-120) }\)
\(=82+\left(-120\right)=-38\)
\(\text{ e,(-275) + |-115|}\)
\(=\left(-275\right)+115=-160\)
\(\text{f,(-34) + |-34|}\)
\(=\left(-34\right)+34=0\)
=-(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
Bài toán 1: Tính.
a) (-34) + (-91) + (-26) + (-99)
= [(-34) + (-26)] + [(-91) + (-99)]
= -60 + (-190)
= -250
b) 125 + |-25|
= 125 + 25
= 150
c) |-26| + |-34|
= 26 + 34
= 60
d) |-82| + (-120)
= -82 + (-120)
= -202
e) (-275) + |-115|
= -275 + 115
= -160
f) (-34) + |-34|
= (-34) + 34
= 0
a: =34x(-100)=-3400
b: =41(-76-24)=-4100
c: =-24(125-225)=2400
d: =26(-237+137)=-2600
e: =25(-63+23)=25x(-40)=-1000
a) \(-75+\left(-325\right)+\left|-45\right|-\left(-125\right)\)
\(=-75-325+45+125\)
\(=\left(45+125\right)-\left(75+325\right)\)
\(=170-400\)
\(=-230\)
b) \(62+\left|128\right|-\left|-155\right|-\left|70\right|\)
\(=62+128-155-70\)
\(\Leftrightarrow190-225\)
\(=-35\)
c) \(815+\left[95+\left(-815\right)+\left(-45\right)\right]\)
\(=815+95-815-45\)
\(=\left(815-815\right)+\left(95-45\right)\)
\(=0+50\)
\(=50\)
d) \(5+\left(-7\right)+9+\left(-11\right)+...+25+\left(-27\right)\)
\(=\left(5-7\right)+\left(9-11\right)+...+\left(25-27\right)\)
\(=-2-2-...-2\)
\(=-2.11\)
\(=-22\)
e) \(34+35+36+37-24-25-26-27\)
\(=\left(34-24\right)+\left(35-25\right)+\left(36-26\right)+\left(37-27\right)\)
\(=10+10+10+10\)
\(=40\)
a) (-34) + (-91) + (-26) + (-99)
= [(-34) + (-26)] + [(-91) + (-99)]
= (-60) + (-190)
= - 250
a) ( - 34 ) + ( - 91 ) + ( - 26 ) + ( - 99 )
= [ ( - 34 ) + ( - 26 ) ] + [ ( - 91 ) + ( - 99 ) ]
= - 60 + ( - 190 )
= - 250
Cbht
a)-250
b)150
c)-60
d)-202
e)-390
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