Question

9.6+9.9x99的简便算法

9.6+9.9x99的简便算法

Answer 1

9.6+9.9×99
=（9.9-0.3）+9.9×99
=9.9×（1+99）-0.3
=9.9×100-0.3
=990-0.3
=989.7

Answer 2

题目不正确吧