简便计算0.125×4+0.25×3+0.5×2
解题思路:不能进行简便运算的按顺序计算,简便运算核心是运用加法和乘法各种定律进行计算,计算出整数部分方便后续计算的过程
解题过程:
0.125×4+0.25×3+0.5×2
=0.5+0.25×3+0.5×2
=0.5+0.75+0.5×2
=0.5+0.75+1
=1.25+1
=2.25
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这道题的简便算法可以把题变成这样子的
零点25×2+0点25×3+0点25×4
0.125*4+0.25*3+0.5*2
=0.5+0.75+1
=1.25+1
=2.25
解:
0.125×4+0.25×3+0.5×2
=0.25x0.5x4+0.25x3+1
=0.25x2+0.25x3+1
=0.25x(2+3)+1
=0.25x5+1
=1.25+1
=2.25