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6.38X9.9+3.62X0.3用简便方法如何计算
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6.38X9.9+3.62X0.3
=6.38*0.3+6.38*9.6+3.62*0.3
=(6.38+3.62)*0.3+6.38*(10-0.4)
=10*0.3+63.8-6.38*0.4
=66.8-2.552
=64.248
=6.38*0.3+6.38*9.6+3.62*0.3
=(6.38+3.62)*0.3+6.38*(10-0.4)
=10*0.3+63.8-6.38*0.4
=66.8-2.552
=64.248
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