9.9×6.3+0.63和10.1×8.5-0.83的简便方法怎么计算?

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/05 18:39:49

9.9×6.3+0.63和10.1×8.5-0.83的简便方法怎么计算?

9.9×6.3+0.63
=9.9×6.3+6.3×0.1……变一变就简便
=6.3×(9.9+0.1)
=63
10.1×8.5-0.83
=(10+0.1)×8.5-0.83
=85+(0.85-0.83)
=85+0.02
=85.02