【題目】計算下面各題(能簡算的要簡算)
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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