题目内容
对的在括号里打“√”,错的打“×”并改正
(1)600-600÷3+400
=0÷3+400
=0+400
=400
(2)25×4÷5×4
=100÷20
=5
(1)600-600÷3+400
=0÷3+400
=0+400
=400
×
×
(2)25×4÷5×4
=100÷20
=5
×
×
.分析:(1)先算除法,再算减法,最后算加法;
(2)按照从左向右的顺序进行计算.
(2)按照从左向右的顺序进行计算.
解答:解:
(1)×;
600-600÷3+400,
=600-200+400,
=400+400,
=800;
(2)×;
25×4÷5×4,
=100÷5×4,
=20×4,
=80.
故答案为:×,×.
(1)×;
600-600÷3+400,
=600-200+400,
=400+400,
=800;
(2)×;
25×4÷5×4,
=100÷5×4,
=20×4,
=80.
故答案为:×,×.
点评:此题主要考查整数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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