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99×89用简便方法计算脱式计算

99×89用简便方法计算脱式计算 99×89 =(100-1)×89 =100×89-89 =8900-89 =8811. 请采纳,谢谢.

98x89 =100x89-2x89 =8900-178 =8722

解: 321+543×89 =321+543×(90-1) =543×90-(543-321) =48870-222 =48648

89×99+89 =89×(99+1) =89×100 =8900

103×89用脱式计算还用简便算 =(100+3)×89 =100×89+3×89 =8900+267 =9167

62×11+62×89 =62x(11+89) =62x100 =6200 , 你好,本题已解答,如果满意 请点右下角“采纳答案”。

88x4/89 =(89-1)x4/89 =89x4/89-4/89 =4-4/89 =3又85/89

78x12+89x78-78 =78x12+89x78-78x1 =78x(12+89-1) =78x(101-1) =78x100 =7800

0.89/7.6-0.89/6.6脱式计算用简便方法 0.89/7.6-0.89/6.6 =0.89÷(7.6-6.6) =0.89÷1 =0.89

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