38.4乘99简便运算
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38.4乘99简便运算
=38.4×99
=38.4×(100-1)
=38.4×100-38.4
=3840-38.4
=3801.6
38.4*100-38.4=3801.6,即38.4*(100-1)=38.4*100-38.4*1=3801.6
38.4乘99简便运算
=38.4×99
=38.4×(100-1)
=38.4×100-38.4
=3840-38.4
=3801.6
38.4*100-38.4=3801.6,即38.4*(100-1)=38.4*100-38.4*1=3801.6