题目内容
数学医院.(对的打“√”,错的打“×”,并改正)
分析:(1)原题在计算除法时,商应为60,不是600;
(2)应先算除法,再算加法,计算顺序错了;
(3)(4)应先算括号内的,再算括号外的.
(2)应先算除法,再算加法,计算顺序错了;
(3)(4)应先算括号内的,再算括号外的.
解答:解:(1)540÷9+26,
=60+26,
=86;
(2)128+324÷4,
=128+81,
=209;
(3)(500-365)÷5,
=135÷5,
=27;
(4)(545+240)÷5,
=785÷5,
=157.
=60+26,
=86;
(2)128+324÷4,
=128+81,
=209;
(3)(500-365)÷5,
=135÷5,
=27;
(4)(545+240)÷5,
=785÷5,
=157.
点评:掌握运算顺序和运算法则,是解答本题的关键.
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