直接写出得数：8.3﹣3.4= 3.5×0.2= 225+475= 8.6÷0.5= 3.98×4×2.5=+= ÷3= 8.1﹣6= ×= 1÷×=
8+2= 7-5= 7+2= 10-10= 9-9= 1+1=
10-3= 6+1= 9+1= 8-3= 9-6= 4+3=
5-5= 6+0= 7-7= 4+0= 9+0= 10-9=
7-0= 6-0= 7-7= 4-0= 9-0= 10-9=
5-0= 6-1= 9-1= 8-3= 9-6= 4-3=
+
= 
÷3= 8.1﹣6
= 
×
= 1÷
×
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