4.9X0,26+3.99除1.4 1.25X0.25X0.4X0.8 简便计算
4.9X0,26+3.99除1.4
=1.274+2.85
=4.124
1.25X0.25X0.4X0.8
=(1.25x0.8)x(0.25x0.4)
=1x0.1
=0.1
=1.274+2.85
=4.124
1.25X0.25X0.4X0.8
=(1.25x0.8)x(0.25x0.4)
=1x0.1
=0.1
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