直接写出结果．
2.5+3.2= 0.5+15= 4．O+3.8=
8.1+4.7= 5.4+1.5= 7.3+3.3=
2.5﹣1.2= 4.4﹣3.3= 6.5﹣0.4=
8.5﹣3.5= 12.7﹣7.6= 6.8﹣4.5=
直接写出结果．
2.5+3.2= 0.5+15= 4．O+3.8=
8.1+4.7= 5.4+1.5= 7.3+3.3=
2.5﹣1.2= 4.4﹣3.3= 6.5﹣0.4=
8.5﹣3.5= 12.7﹣7.6= 6.8﹣4.5=
．
+
= 43×200= 1﹣
= 350+50=
+
= 45﹣9×5=
﹣
=
﹣
=
+
=
+
﹣
=
=
﹣
=
+
=
﹣
=
+
=
+
= 1﹣
﹣
=
﹣
=
+
= 1﹣
=
﹣
+
=
=
=
=
=
=
=
= 1 
= 1﹣
=
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