直接写得数．
+
= 0÷
= 
×6= 7.125﹣
=
8.4+8= 3：0.5= 6÷
= 100×0.1%=
﹣
= 
×
= 
÷
= 1÷5×=
×
÷3= 
×4+= 2﹣
﹣
= 
×5÷×5=
直接写得数．+= 0÷= ×6= 7.125﹣=
8.4+8= 3：0.5= 6÷= 100×0.1%=﹣= ×= ÷= 1÷5×=×÷3= ×4+= 2﹣﹣= ×5÷×5=
= 3
= 1
= 4
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