
4·8X0·25的简便运箅还有0·78X98 10
展开全部
4.8x0.25
=1.2x4x0.25
=1.2x1
=1.2
0.78x98
=0.78x(100-2)
=0.78x100-0.78x2
=78-1.56
=76.44
=1.2x4x0.25
=1.2x1
=1.2
0.78x98
=0.78x(100-2)
=0.78x100-0.78x2
=78-1.56
=76.44
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