Question

4.3x9.8简便计算怎么写？

Answer 1

4.3x9.8
=4.3×（10-0.2）
=4.3×10-4.3×0.2
=43-0.86
=42.14

Answer 2

因为9.8=10-0.2，所以原式等于4.3×（10-0.2）运用乘法分配律就是有4.3×10-4.3×0.2=43-0.86=42.14