4年级上册数学99x78+33x66巧算怎么做
3个回答
99x78+33x66=99x78+33x3x22
=99x78+99x22
=99x(78-22)
=99x100
=9900
相关问题
99.9x7.78+33.3x6.66的巧算
99.99乘77.78+33.33乘66.66用简便计算怎么算
9.99*7.78+3.33+6.66这道题的简算怎么算?
150x78+220x15的巧算怎么做
9.99X7.78+3.33X6.66用简便运算
66.6乘33.3怎么巧算
99*78+33*66怎样简便计算
99.99X22.22+33.33X33.34怎么简算?
9.99*7.78+3.33*6.66的简便方法怎样算
小学四年级数学66×99+66的简便方法怎么算