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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:×.
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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