25×12,你会用四种不同的方法进行简便运算

Question

如题所述

Answer 1

25 × 12
= 25 × 4 × 3
= 100 × 3
= 300

25 × 12
= 25 × 2 × 6
= 50 × 6
= 300

25 × 12
= 25 × 8 × 1.5
= 200 × 1.5
= 300

25 × 12
= 25 × 6 × 2
= 150 × 2
= 300

第一种最佳。

Answer 2