| 637+263= | 905-896= | 600-298= | 517-348= | 376+284= | 427+543= |
| 746+279= | 637+268= | 200-183= | 359-136= | 408-57= | 725+538= |
| 501+389= | 725+538= | 301-84= | 500-453= | 746+163= | 726+598= |
| 23÷5= | 74÷9= | 17÷2= | 60÷8= | 53÷7= | 32÷6= |
| 20÷6= | 33÷8= | 123×2= | 423×2= | 212×3= | 221×4= |
| 634×8= | 681×8= | 499×3= | 765×7= | 508×3= | 305×9= |
| 603×4= | 406×6= | 380×5= | 640×2= | 450×6= | 460×7= |
| 解:637+263=900, | 905-896=9, | 600-298=302, | 517-348=169, | 376+284=660, | 427+543=970, |
| 746+279=1025, | 637+268=905, | 200-183=17, | 359-136=223, | 408-57=351, | 725+538=1263, |
| 501+389=890, | 725+538=1264, | 301-84=217, | 500-453=47, | 746+163=909, | 726+598=1324, |
| 23÷5=4…3, | 74÷9=8…2, | 17÷2=8…1, | 60÷8=7…4, | 53÷7=7…4, | 32÷6=5…2, |
| 20÷6=3…2, | 33÷8=4…1, | 123×2=246, | 423×2=846, | 212×3=636, | 221×4=884, |
| 634×8=5072, | 681×8=5448, | 499×3=1497, | 765×7=5355, | 508×3=1524, | 305×9=2745, |
| 603×4=2412, | 406×6=2436, | 380×5=1900, | 640×2=1280, | 450×6=2700, | 460×7=3220. |
分析:根据整数加减乘除法的计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.