1.25×1.2+1.5×2.5+0.3×1.25简便计算怎么算?
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1.25×1.2+1.5×2.5+0.3×1.25
=1.25×(1.2+0.3)+1.5×2.5
=1.25×1.5+1.5×2.5
=1.5×(1.25+2.5)
=1.5×3.75
=1.5×(4-0.25)
=6-0.375
=5.625
=1.25×(1.2+0.3)+1.5×2.5
=1.25×1.5+1.5×2.5
=1.5×(1.25+2.5)
=1.5×3.75
=1.5×(4-0.25)
=6-0.375
=5.625
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