| 800÷5= | 60×50= | 46+64= | 0.6+6= |
| 23+34= | 5﹣3.6= | 8+9.7= | 12×200= |
| 9+4.5= | 15×40= |  ﹣ = |  + = |
-(
+
) 
﹣（
+
）
﹣0.81﹣0.19
+
﹣
﹣
） 
+
= 
﹣
= 
﹣
= 5﹣= 1﹣﹣
=
+
= 
﹣
= 
+
+
= 
﹣
﹣
+
+
+
+
． 
+
+
+
﹣
﹣
﹣
+5
﹣6
+
． 
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