直接写出得数．= 100×0.1%=3.2×= =1.75+0.25= == =
能简算的要简算：﹣+ 5﹣﹣﹣（+）+++++++．
计算．﹣=﹣=+=+=﹣1=﹣=+=﹣= 1﹣=
计算．﹣（）+++（﹣）﹣﹣．
直接写得数：+=﹣=﹣=﹣= 1﹣=+=+=+=﹣= 2﹣=
直接写得数．+=﹣= 1﹣=+=+=+=
= 100×0.1%=
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