立即下载 | 限时 免费 下载 |
同类热门下载
简介:
类型(一):“拆分型”——“99”、“101”、“补1”型
(1)8.75×11-8.75 (2)0.67×99
=8.75×11-8.75×1 =0.67×(100-1)
=8.75×(11-1) =0.67×100-0.67×1
=8.75×10 =67-0.67
=87.5 =66.33
(3)8.8×1.25 (4)79×2.5+22×2.5-2.5
=1.1×8×1.25 =79×2.5+22×2.5-2.5×1
=1.1×(8×1.25) =(79+22-1)×2.5
=1.1×10 =100×2.5
=11 =250