巧算过程解析75+25-75+25
解题思路:四则运算规则(按顺序计算,先算乘除后算加减,有括号先算括号,有乘方先算乘方)即脱式运算(递等式计算)需在该原则前提下进行
解题过程:
75+25-75+25
=75-75+(25+25)
=0+50
=50
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75+25-75+25简便运算
75-75+25×2=0+25×2=50
75十25一75十25
=75-75十25十25
=25+25
=50
75+25-75+25
=(75-75)+(25+25)
=0+50
=50
75+25-75+25
=75-75+25+25
=0+25+25
=50