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.