Question

216:{18×5+6×6:[3×2-(7+25:5):3}}×2=

579+7×[28×18-36:(11+4:4)×106+51:3}=

80-2×{285:19+15:3×[265-(50:25+2)×65]}=

Answer 1

216÷{90+36÷[6-(7+5)÷3]}×2
216÷[90+36÷(6-12÷3)]×2
216÷[90+36÷(6-4)]×2
216÷(90+36÷2)×2
216÷(90+18)×2
216÷108×2
2×2=4

579+7×[504-36÷(11+1)×106+17]
579+7×(504-36÷13×106+17)
579+7×(504-2×106+17)
579+7×(504-212+17)
579+7×(292+17)
579+7×309
579+2163=2742

80-2×{15+5×[265-(2+2)×65]}
80-2×[15+5×(265-4×65)]
80-2×[15+5×(265-260)]
80-2×(15+5×5)
80-2×(15+25)
80-2×40
80-80=0

Answer 2

=216:{18.5+6.6:[3.2-(7+25:5):3]}.2
=216:[18.5+6.6:(3.2-12:3)].2
=216:(18.5+6.6:2).2
=216:108.2
=4

579+7.[28.18-36:(11+4:4).106+51:3]=
=579+7.(28.18-36:12.106+51:3)
=579+7.(504-3.106+17)
=579+7.(504-318+17)
=579+7.203
=579+1421
=2000

80-2.{285:19+15:3.[265-(50:25+2).65}]=
=80-2.[285:19+15:3.(265-4.65)]
=80-2.[285:19+15:3.(265-260)]
=80-2.(285:19+15:3.5)
=80-2.(15+25)
=80-2.40
=80-80
=0