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

÷7+ ×

③( + )×6.3

÷( )×3

⑤1﹣ ×(0.32+

⑥(0.25+ )×(

【答案】解: 86.4÷3.2﹣6.4×3.2

=27﹣20.48

=6.52

÷7+ ×

= × + ×

=( + )×

=1×

=

+ )×6.3

= ×6.3+ ×6.3﹣ ×6.3

=4.9+1.2﹣2.7

=6.1﹣2.7

=3.4

÷( )×3

= ÷ ×3

=7×3

=21

1﹣ ×(0.32+

=1﹣ ×0.32﹣ ×

=1﹣0.04﹣0.2

=0.96﹣0.2

=0.76

(0.25+ )×(

= ×

=

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