Question

11X22+0.22X3300+660X2.2用简便方法计算 根据积不变的规律、把0.22X33？

有几种方法

Answer 1

解原式=11x22+22x33+66x22
=22x(11+33+66)
=22x110
=22x(100+10)
=2200+220
=2420.

Answer 2

11×22+0.22×3300+660×2.2
=22×(11+33+66)
=22×(100+10)
=2200+220
=2420