脱式计算，能简算的要简算．60÷15+2.5×1.9 ×[÷（﹣）] ++﹣0.65×8.7+6.5×0.23﹣0.65 ．
计算下面各题． ．
= × ==．
口算显身手．×2=×== 12﹣=×= 1×=×0= 3×=×=
口算题．×12=×= 60×=×=
阴影部分是 平方米． 如图求的是 的 是多少？列式计算 ．
×[
÷（
﹣
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+
﹣
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= × =
=
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×2=
×
=
=
=
×
= 1×
=
×0= 3×
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×
=
×12=
×
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=
×
=
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