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(1)(+11)+(-7)+(+10)+(-3)+(-11)
=(+11)+(-11)+(-7)+(+10)+(-3)
=0+(-7)+(+10)+(-3)
=0
(2)-(-2.4)-(+3.7)+(-4.6)-(-5.7)
=2.4-3.7-4.6+5.7
=(2.4+5.7)-(3.7+4.6)
=8.1-8.3
=-0.2
(3)1-3+5-7+9-11+...+97-99
=(1-3)+(5-7)+(9-11)+...+(97-99)
=-2+(-2)+(-2)+...+(-2)
=-2*25
=-50
(4)丨-2/5丨-(3.5)+丨-1-2/3丨
=2/5-3.5+5/3
=2/5-7/2+5/3
=2/5+5/3-7/2
=31/15-7/2
=-43/30 (1) 9*27
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
=(+11)+(-11)+(-7)+(+10)+(-3)
=0+(-7)+(+10)+(-3)
=0
(2)-(-2.4)-(+3.7)+(-4.6)-(-5.7)
=2.4-3.7-4.6+5.7
=(2.4+5.7)-(3.7+4.6)
=8.1-8.3
=-0.2
(3)1-3+5-7+9-11+...+97-99
=(1-3)+(5-7)+(9-11)+...+(97-99)
=-2+(-2)+(-2)+...+(-2)
=-2*25
=-50
(4)丨-2/5丨-(3.5)+丨-1-2/3丨
=2/5-3.5+5/3
=2/5-7/2+5/3
=2/5+5/3-7/2
=31/15-7/2
=-43/30 (1) 9*27
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
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