口算 65+37×0= 28×0÷54= 4×28×25= 100×3÷100×3= 25×28= 50-25÷5= 2.7×0.03=
口算65+37×0=28×0÷54=4×28×25=100×3÷100×3=25×28=50-25÷5=2.7×0.03=2.4÷0.06=4.2÷3=1×0.94=1....
口算 65+37×0= 28×0÷54= 4×28×25= 100×3÷100×3= 25×28= 50-25÷5= 2.7×0.03= 2.4÷0.06= 4.2÷3= 1×0.94= 1.2×0.8= 0.39÷1.3= 1-89= 18+78= 14-19= 14+16=
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| 65+37×0=65 | 28×0÷54=0 | 4×28×25=2800 | 100×3÷100×3=9 |
| 25×28=700 | 50-25÷5=45 | 2.7×0.03=0.081 | 2.4÷0.06=40 |
| 4.2÷3=1.4 | 1×0.94=0.94 | 1.2×0.8=0.96 | 0.39÷1.3=0.3 |
| 1-= | +=1 | -= | += |
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