0.25×27×4 45×36+64×45 1.25×320×25 0.96×25
9.9×999+9.9 1.08×125 8×25×1.25×16 489×101﹣489
33×1.03 28×45+30×13 5.6×9+56 0.98×54．
0.25×27×4 45×36+64×45 1.25×320×25 0.96×25
9.9×999+9.9 1.08×125 8×25×1.25×16 489×101﹣489
33×1.03 28×45+30×13 5.6×9+56 0.98×54．
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