口算 3.8×4=5.6÷0.8=0.2×0.03=4.2÷3.5=0.25×32=1.25×0.8=7.2÷0.9=0.2×0.5=3.8×10=6.4×100=100
口算3.8×4=5.6÷0.8=0.2×0.03=4.2÷3.5=0.25×32=1.25×0.8=7.2÷0.9=0.2×0.5=3.8×10=6.4×100=100×...
口算 3.8×4=5.6÷0.8=0.2×0.03=4.2÷3.5=0.25×32=1.25×0.8=7.2÷0.9=0.2×0.5=3.8×10=6.4×100=100×0.9=0.6+0.4=1+0.1=1-0.5=4×1.5=0.2×0.2=8.4×4=0.89-0.09=0.4+0.43=34×0.2=
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3.8×4=15.2 | 5.6÷0.8=7 | 0.2×0.03=0.006 | 4.2÷3.5=1.2 | 0.25×32=8 |
1.25×0.8=1 | 7.2÷0.9=8 | 0.2×0.5=0.1 | 3.8×10=38 | 6.4×100=640 |
100×0.9=90 | 0.6+0.4=1 | 1+0.1=1.1 | 1-0.5=0.5 | 4×1.5=6 |
0.2×0.2=0.04 | 8.4×4=33.6 | 0.89-0.09=0.8 | 0.4+0.43=0.83 | 34×0.2=6.8. |
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