题目内容
120-20×5=100×5=500．
×
×
．（判断对错）分析：按照先算乘法，再算减法算出结果进一步比较即可．
解答：解：120-20×5
=120-100
=20；
20≠500；
所以原题计算错误．
故答案为：×．
=120-100
=20；
20≠500；
所以原题计算错误．
故答案为：×．
点评：整数四则混合运算的关键是抓住运算顺序，正确按运算顺序计算．
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