计算:314×31.4+628×68.6+68.6×686=_.
问题描述:
计算:314×31.4+628×68.6+68.6×686=______.
答
314×31.4+628×68.6+68.6×686,=314×31.4+68.6×(628+686),=314×31.4+68.6×(1000+314),=314×31.4+68600+314×68.6,=314×(31.4+68.6)+68600,=31400+68600,=100000.故答案为:100000....