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5
8
-
5
8
÷
5
4
=0÷
5
4
=0
×
×
(判断对错)
改正:
分析:此题应先算除法,再算减法.而原题先算了减法,再算除法,故本题错误.
解答:解:
5
8
-
5
8
÷
5
4

=
5
8
-
5
8
×
4
5

=
5
8
-
1
2

=
1
4

故答案为:×.
点评:四则混合运算,应按运算顺序和运算法则进行计算.先算乘除,再算加减.
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