摘要：3+7= 6-1= 4+4= 3+4+7= 8+8= 5+3= 6+7= 9-5+8= 10-6= 10-5= 19-9- 4+5+7= 2+10= 5+8= 7-4= 20-10+3= 5+8= 3+9= 8+9= 2+9-10=
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| 42.4+7.6= | 1.58+2.42= | 23.5+76.5÷0.25= | 7.8-5.6= |
| 1.25×4= | 34.6÷0.2×4= | 0.24÷0.3= | 7.8×0.5= |
| 1÷0.2-1×0.2= | 57÷5.7= | 8.1-0.05= | 0.2×0.5= |