Question

45x50 53x42简便运算方法

Answer 1

我们可以使用交叉相乘法进行简便计算：

45x50 = (50-5) x 50 = 2500 - 225 = 2275

53x42 = (50+3) x (50-8) = 2650 - 400 + 24 = 2274

所以，45x50=2275，53x42=2274。

Answer 2

45 x 50 = (40 + 5) x 50 = 40 x 50 + 5 x 50 = 2000 +250 = 2250
53 x 42 = (50 +3 ) x 42 = 50 x 42 + 3 x 42 = 2100 + 126 = 2226