直接写得数．8.2﹣1.98= 3.7÷0.25= 3.5+2.7+16.5=5.4﹣0.5﹣1.4= 9.6×0.5= 3.74÷0.2÷0.5=
直接写得数；+=+= 1﹣=+=+=+=+=﹣=
计算：= ．
= ．
5﹣4= ．
+
=
+
= 1﹣
=
+
=
+
+
=
+
﹣
=
= ．
= ．
= ．
﹣4= ．
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