口算． 80×0.05= 16÷0.4= 4.5÷4.5×0.2= 1.6×0.3= 8.2÷0.01= 0.56÷0.4= 7.5×4=
口算．80×0.05=16÷0.4=4.5÷4.5×0.2=1.6×0.3=8.2÷0.01=0.56÷0.4=7.5×4=8.1÷8.1=8.1÷3=0.5×0.5=4...
口算． 80×0.05= 16÷0.4= 4.5÷4.5×0.2= 1.6×0.3= 8.2÷0.01= 0.56÷0.4= 7.5×4= 8.1÷8.1= 8.1÷3= 0.5×0.5= 4.2÷1.4= 500×0.2= 0.48÷0.4= 0.35×20= 4.8÷48= 0.2×0.4= 0.5×0.5÷0.5×0.5= 1.25×3×0.8=
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| 80×0.05=4 | 16÷0.4=40 | 4.5÷4.5×0.2=0.2 |
| 1.6×0.3=0.48 | 8.2÷0.01=820 | 0.56÷0.4=1.4 |
| 7.5×4=3 | 8.1÷8.1=1 | 8.1÷3=2.7 |
| 0.5×0.5=0.25 | 4.2÷1.4=3 | 500×0.2=100 |
| 0.48÷0.4=1.2 | 0.35×20=7 | 4.8÷48=0.1 |
| 0.2×0.4=0.08 | 0.5×0.5÷0.5×0.5=0.25 | 1.25×3×0.8=3 |
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