题目内容
脱式计算.
①4050-6300÷42
②5.04×6.5-2.76
③
⑤
⑥.
解:
(1)4050-6300÷42
=4050-6300÷7÷6,
=4050-150,
=3900;
(2)5.04×6.5-2.76
=32.76-2.76,
=30;
(3)
=()×175,
=1×175,
=175;
(5)
=13÷,
=12×,
=3;
(6)
=×(),
=,
=1;
分析:本题据四则混合运算的运算法则计算即可.
点评:完成本题要认真分析各组数据,看是否能进行简便计算.
(1)4050-6300÷42
=4050-6300÷7÷6,
=4050-150,
=3900;
(2)5.04×6.5-2.76
=32.76-2.76,
=30;
(3)
=()×175,
=1×175,
=175;
(5)
=13÷,
=12×,
=3;
(6)
=×(),
=,
=1;
分析:本题据四则混合运算的运算法则计算即可.
点评:完成本题要认真分析各组数据,看是否能进行简便计算.
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