题目内容
【题目】计算下面各题（能简算的要简算）
①86.4÷3.2﹣6.4×3.2 | ② | ③（ |
④ | ⑤1﹣ | ⑥（0.25+ |
【答案】解： ①86.4÷3.2﹣6.4×3.2
=27﹣20.48
=6.52
② 
÷7+ 
× 
= × + ×
=（ + ）×
=1×
=
③（ 
+ 
﹣ 
）×6.3
= ×6.3+ ×6.3﹣ ×6.3
=4.9+1.2﹣2.7
=6.1﹣2.7
=3.4
④ 
÷（ 
﹣ 
）×3
= ÷ 
×3
=7×3
=21
⑤1﹣ 
×（0.32+ 
）
=1﹣ ×0.32﹣ ×
=1﹣0.04﹣0.2
=0.96﹣0.2
=0.76
⑥（0.25+ 
）×（ 
﹣ ）
= 
× 
= 
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