666.66*333.33的简算

666.66*333.33的简算
2024-12-27 11:19:21
推荐回答(1个)
回答1:

原式=2×(1000-0.01)/3×(1000-0.01)/3
=2×(1000-0.01)²/9
=2×(1000 000-200+0.0001)/9
=2×(111 111.11111111-22.22222222+0.00001111)
=2×(111 111.1111-22.2222)
=2×(111100-11.1111)
=222 200-22.2222
=222177.7778