| A．92 | B．173 | C．121 |
| A．10 | B．100 | C．111 |
| 84-63÷7=________ | 420×2=________ | 54÷6=________ | 103×4≈________ |
| 25-25×0=________ |  +  =________ | 1-  =________ | 198×5≈________ |
| 806﹣279= | 453+556= | 269×4= |
| 503×6= | *467+533= | *634﹣182= |
| *49÷9= | ||
| 50×5= | 110×6= | 81﹣54= | 600×7= |
| 3700+300= | 700+600= | 500+5000= | 465×0= |
| 56÷7= | 49÷5= | 275+0= | 123×2= |
 +  = | 1﹣  = | 102×6≈ | 198×5≈ |
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