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235 - ( 34 + 135) -100
= 235 - 169 - 100
= 66 - 100
= 34
Chacc dungg aa:>
A, 5+ ( -12 ) - 10 = -17
B, 25 - (-17) + 24 -12=54
C, 5^6 : 5^4 + 2^3 . 2^2 -225 : 15^2 =56
D, ( -5 - 3). (3 -5 ) : ( -3 + 5)=8
E,4. (13-16) -(3-5).(-3^2) =15
F, 235 - (34 + 135)-100=-34
1) 40 + 15 + (-10) + (-15) 2) -13 + (-750) + (-17) + 750 3) (35 - 17) + (17 + 120 - 35)
= 40 + 15 - 10 - 15 = -13 - 750 - 17 + 750 = 35 - 17 + 17 + 120 - 35
= (40 - 10) + (15 - 15) = (-13 - 17) + (-750 + 750) = (35 - 35) + (-17 + 17) + 120
= 30 = -30 = 120
4) (55 + 45 + 15) - (15 - 55 + 45) 5) -(12 + 21 - 23) - (23 - 21 + 10) 6) (2020 - 79 + 15) - (-79 + 15)
= 55 + 45 + 15 - 15 + 55 - 45 = -12 -21 + 23 - 23 + 21 - 10 = 2020 - 79 + 15 + 79 - 15
= (45 - 45) + (15 - 15) + (55 + 55) = (-12 - 10) + (-21 + 21) + (23 - 23) = 2020 + (-79 + 79) + (15 - 15)
= 110 = -22 = 2020
7) -(515 - 80 + 91) - (2010 + 80 - 91) 8) 25 - (-17) + 24 - 12 9) 235 - (34 + 135) - 100
= -515 + 80 - 91 - 2010 - 80 + 91 = 25 + 17 + 24 - 12 = 235 - 34 - 135 - 100
= (-515 -2010) + (80 - 80) + (-91 + 91) = 54 = -34
= -2525
10) (13 + 49) - (13 - 135 + 49)
= 13 + 49 - 13 + 135 - 49
= (13 - 13) + (49 - 49) +135
= 135
a, 72 - 20 + 135 b, (-26) + 16 + (-34) + 26 c, 24.82 + 24.18 - 100
= 52 + 135 =( -26 + 26) - ( 34 - 16) = 24. ( 82 + 18) - 100
= 187 = 0 - 18 = 24 . 100 - 100
= -18 = 100.( 24 - 1)
= 2300
a) \(5+\left(-12\right)-10=\left(-7\right)-10=-17\)
b) \(25-\left(-17\right)+24-12=42+24-12=66-12=54\)
c) \(\left(-5-3\right)\cdot\left(3-5\right)\div\left(-3+5\right)=\left(-8\right)\cdot\left(-2\right)\div2=8\)
d) \(5^6\div5^4+2^3\cdot2^2-225\div15^2=25+32-1=56\)
e) \(4\cdot\left(13-16\right)-\left(3-5\right)\cdot\left(-3\right)^2=4\cdot\left(-3\right)-\left(-2\right)\cdot9=6\)
f) \(235-\left(34+135\right)-100=235-169-100=-34\)
214+[120-(214+120)]
=214+120-(214+120)
=214+120-214-120
=(214-214)+(120-120)
=0+0=0
(-321)-[(-321+35)-235]
=(-321)-(-321+35)+235
=(-321)+(-321-35)-235
=-321-(-321) +(235-35)
=0+200
=200
(18+29)+(158-29-18)
=18+29+158-29-18
=(18-18)+(29-29)+158
=0+0+158
=158
(13-135+49)-(13+49)
=13-135+49-13-49
=(13-13)+(49-49)-135
=0-135
= -135
25+(-13+8)
=25+(-5)
=20
7+(-12+43)-[2+(19-34)]
=7+31-[2+(-15)]
=7+31-(-13)
=38+(-13)
=25
nhiều quá, mk phụ chút thôi
1.a)214+[120-(214+120)=214+120-214-120=(214-214)+(120-120)=0+0=0
b)(-321)-[(-321+35)-235]=(-321)+321-35+235=[(-321)+321]+(235-35)=0+200=200
2.a)(18+29)+(158-29-18)=18+29+158-29-18=(18-18)+(29-29)+158=0+0+158=158
235 - ( 34 + 135) - 100
= 235 - 34 - 135 - 100
= 235 - ( 135 + 100) - 34
= 235 - 235 - 34
= 0 - 34
= -34
235 - [ 34 + 135 ] - 100
= 235 - 169 - 100
= 66 - 100
= - 34