5点28乘99简便运算怎么算

Question

如题所述

Answer 1

5.28*99
=5.28*(100-1)
=5.28*100-5.28*1
=528-5.28
=522.72

Answer 2

5.28×99
=5.28×（100-1）
=5.28×100-5.28×1
=528-5.28
=522.72