直接写得数.4.2×0.5= 6.7+5.8+3.3= 0.16÷0.08= 5.1-0.7-2.3= 0.28×9+0.28= 2.5×0.5= (4.8+
直接写得数.4.2×0.5=6.7+5.8+3.3=0.16÷0.08=5.1-0.7-2.3=0.28×9+0.28=2.5×0.5=(4.8+5.2)×3.6=0.1...
直接写得数.4.2×0.5= 6.7+5.8+3.3= 0.16÷0.08= 5.1-0.7-2.3= 0.28×9+0.28= 2.5×0.5= (4.8+5.2)×3.6= 0.18÷9= 2.52×0.7÷O.07= 1.25×0.8×0.5=
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