17.4*2.43-1.43*7.4怎样简便计算
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17.4*2.43-1.43*7.4怎样简便计算17.4*2.43-1.43*7.4怎样简便计算17.4*2.43-1.43*7.4怎样简便计算17.4*2.43-1.43*7.4=10x2.43+7
17.4*2.43-1.43*7.4怎样简便计算
17.4*2.43-1.43*7.4怎样简便计算
17.4*2.43-1.43*7.4怎样简便计算
17.4*2.43-1.43*7.4
=10x2.43+7.4x2.43-7.4x1.43
=24.3+7.4x(2.43-1.43)
=24.3+7.4
=31.7
17.4*2.43-1.43*7.4
=（10+7.4）*2.43-1.43*7.4
=10*2.43+7.4*2.43-1.43*7.4
=24.3+7.4*(2.43-1.43)
=24.3+7.4
=31.7
(10+7.4)*(1+1.43)-1.43*7.4=10+14.3+7.4+7.4*1.43-7.4*1.43=31.7