直接写得数．
3.6+5.4= 650﹣100= 0.008×1000= 70÷0.01=
2.8×0.5= 25÷
= 8.1÷0.03= 
+3=
×
= 
﹣
= 1÷
= 
×
=+
+
= 
×0.25= 
﹣0.6=1﹣7%=
直接写得数．
3.6+5.4= 650﹣100= 0.008×1000= 70÷0.01=
2.8×0.5= 25÷= 8.1÷0.03= +3=×= ﹣= 1÷= ×=++= ×0.25= ﹣0.6=1﹣7%=
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