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a.120-[7.20-(134-110).5]
=120-(7.20-24.5)
=120-(140-120)
=120-20
=100
b.1987-200.8+1005:5
=1987-1600+201
=588
C, 387.2694+7305.387+387
=387.(2694+7305+1)
=387.10000
3870 000
d,
d.248:{[(368+232):120-3]+122}+2016
=248:{(600:120-3)+122}+2016
=248:(2+122)+2016
=248:144+2016
=2+2016
=2018
a, 1987 - 200 .8 +1005 : 5
= 1987 - 1600 + 201
=387 + 201
=588
b, 3687 + 9541 +6313
=19 541
c,248 : {[(368+232):120-3]+122}+2006
=248 :{[600:100-3]+122}+2006
=248 :{[6-3]+122}+2006
=248:{2+122}+2006
=248:124+2006
=2+2006
=2008
d) 864x48-432x96/864x48x432
=864x48-(432x2)x(96:2)/864x48x432
=864x48-864x48/864x48x432
=0/864x48x432
=0
132 x 99 + 132
= 132 x 99 + 132 x 1
= 132 x ( 99 + 1 )
= 132 x 100
= 13 200
a) (-7)+(-12)+166 = -(7+12)+166=-19+166=147
b) 120-(-24)+(-35) = 120+24-35=109
c) (-264)+(-36)+500=-300+500=200
d)58+97+(-58)+(-47) = [58+(-58)]+(97-47)=0+50=50
e) (-2)+8+(-14)+20+(-26)+32+(-38)+44 = (-2+8)+(-14+20)+(-26+32)+(-38+44) = 6+6+6+6=24
k) 53 + (-76) - (-76) + (-53) = [53+(-53)]+[(-76)+76] = 0+0=0
l) [(-18)+7] + (-111)+66 = -11 + (-45) = -66
h) -(138-63+17)+(-163+38)-(-17) = -138 + 63 - 17 + (-163)+38 + 17 = -138+38 + 63+(-163) -17+17 = -100+(-100) - 0 = -200
g) 215+(-38) - (-58) + 90 - 85 = 215 - 38 + 58 +90 - 85 = 215- 85 + 58 - 38 +90 = 130+20+90=240
j) (-34)+(-84)-(-134)+(-1) = -(34+84+1) + 134 = 15
a) 248: {[( 368+232): 120-3]+122}+2011
=248:{[600:120-3]+122}+2011
=> 248:{ 2+122}+2011
=> 248: 124+2011
=> 2+2011
=> 2013
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018