题目内容
脱式计算. 30÷15+30×15 |
(564-18×24)÷12 |
576÷(33+15) | 909-[36×(350÷14)]. |
分析:本题根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:30÷15+30×15
=2+450,
=452;
(564-18×24)÷12
=(564-432)÷12,
=132÷12,
=11;
576÷(33+15)
=576÷48,
=12;
909-[36×(350÷14)].
=909-[36×25],
=909-900,
=9.
=2+450,
=452;
(564-18×24)÷12
=(564-432)÷12,
=132÷12,
=11;
576÷(33+15)
=576÷48,
=12;
909-[36×(350÷14)].
=909-[36×25],
=909-900,
=9.
点评:当算式中同时含有中括号与小括号时,要先算小括号里面的,再算中括号里面的.
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