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直接写数对又快!7.8+2.3= 0.8×4= 1.5×6= 39×0.01= 20×1.5= 0.3×0.6= 7.8-1.9= 0.9×0.9=
直接写数对又快!7.8+2.3=0.8×4=1.5×6=39×0.01=20×1.5=0.3×0.6=7.8-1.9=0.9×0.9=4.8×0.5=3.68+6.32×...
直接写数对又快!7.8+2.3= 0.8×4= 1.5×6= 39×0.01= 20×1.5= 0.3×0.6= 7.8-1.9= 0.9×0.9= 4.8×0.5= 3.68+6.32×0=
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7.8+2.3=10.1; | 0.8×4=3.2; | 1.5×6=9; | 39×0.01=0.39; |
20×1.5=30; | 0.3×0.6=0.18; | 7.8-1.9=5.9; | 0.9×0.9=0.81; |
4.8×0.5=2.4; | 3.68+6.32×0=3.68; |
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