题目内容

【题目】(苏州)计算下面各题,能简算的要简算.

①630÷18×24 ②0.7+3.9+4.3+6.1 ③16×+4×

④(7.5﹣7.5×0.6)÷4 ⑤(+÷3)×

【答案】①840;②15;③8;④0.75;⑤;⑥1

【解析】

试题分析:①、④、⑤、⑥按分数、整数四则混合运算顺序计算.

②运用加法的结合律与交换律进行计算.

③运用乘法的分配律进行计算即可.

解答:解:①630÷18×24,

=35×24,

=840;

②0.7+3.9+4.3+6.1,

=(0.7+4.3)+(6.1+3.9),

=5+10,

=15;

③16×+4×

=(16+4)×

=20×

=8;

④(7.5﹣7.5×0.6)÷4,

=(7.5﹣4.5)÷4,

=3÷4,

=0.75;

⑤(+÷3)×

=(+×)×

=(+)×

=

=

[]

=×[÷(]

=×[]

=[]

=

=1.

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