题目内容
【题目】计算下面各题.(怎么算简便就怎么算)
①3264÷32+34×5 ②1.05×(3.8﹣0.8)÷6.3 ③85﹣12.8﹣47.2
④20×(1﹣ ﹣ ) ⑤ ×0.75+ × ⑥[1﹣( + )]×12
【答案】①272;②0.5;③25
④7;⑤;⑥2
【解析】
①3264÷32+34×5
=102+170
=272
②1.05×(3.8﹣0.8)÷6.3
=1.05×3÷6.3
=3.15÷6.3
=0.5
③85﹣12.8﹣47.2
=85﹣(12.8+47.2)
=85﹣60
=25
④20×(1﹣ ﹣ )
=20×1﹣20× ﹣20×
=20﹣8﹣5
=7
⑤ ×0.75+ ×
= × +×
= ×( + )
= ×1
=
⑥[1﹣( + )]×12
=[1﹣( )]×12
=[1﹣ ]×12
= ×12
=2
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