| 看你的口算能力怎么样． 160﹣80= |
700+40= |
50+70= |
40+500= |
| 580﹣500= |
110﹣30= |
12×3= |
300+700= |
| 840﹣40= |
800﹣500= |
26÷5= |
72÷9= |
| 42÷7= |
50÷7= |
43÷6= |
41×3= |
| 850﹣50= |
70+300= |
4×21= |
50×3= |
| 3×70= |
30+400= |
80+70= |
31×2= |
| 950﹣900= |
40×3= |
23×2= |
32÷5= |
| 100+90= |
800﹣300= |
+
=
．