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)× ⑥.
【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)×,
=(+×)×,
=(+)×,
=,
=;
⑥[()],
=×[÷()],
=×[],
=[],
=,
=1.
练习册系列答案
相关题目