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136-(36+58)=136-36+58=158
错误
分析:此题错误的原因在于没有很好掌握减法的运算性质,在运用减法的性质去括号时,括号内的各数前面的运算符号都要发生改变.
解答:136-(36+58),
=136-36-58,
=100-58,
=42.
故答案为:×.
点评:一个数减去n个数的和,可以从这个数里依次减去和里的每个加数,如a-(b+c+d)=a-b-c-d.
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