口算 5×4=6.4÷0.8=7.2×0.01=10÷4=0.36×2=1÷0.125=0.25×8=8.1÷0.3=0.1×0.02=1.6÷16=2.4×2.5=3.
口算5×4=6.4÷0.8=7.2×0.01=10÷4=0.36×2=1÷0.125=0.25×8=8.1÷0.3=0.1×0.02=1.6÷16=2.4×2.5=3.2...
口算 5×4=6.4÷0.8=7.2×0.01=10÷4=0.36×2=1÷0.125=0.25×8=8.1÷0.3=0.1×0.02=1.6÷16=2.4×2.5=3.2÷1.6=0.25×4=3.5+7.6=3×0.2×0.5=12-6.2-3.8=8×（2.5+0.25）=2.56-0.37=0.125÷0.25=1.6+7×0.4=
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| 5×4=20 | 6.4÷0.8=8 | 7.2×0.01=0.072 | 10÷4=2.5 | 0.36×2=0.72 |
| 1÷0.125=8 | 0.25×8=2 | 8.1÷0.3=27 | 0.1×0.02=0.002 | 1.6÷16=0.1 |
| 2.4×2.5=6 | 3.2÷1.6=2 | 0.25×4=1 | 3.5+7.6=11.1 | 3×0.2×0.5=0.3 |
| 12-6.2-3.8=2 | 8×（2.5+0.25）=22 | 2.56-0.37=2.19 | 0.125÷0.25=0.5 | 1.6+7×0.4=4.4 |
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