UC知道英语开放探究题
来源：百度知道 编辑：UC知道 时间：2024/05/09 16:52:29
1.Mary is 12 years old.two years ago,she was twice as old as her brother Jack.How old is Jack now?How old will Mary be when Jack is twice his present age?
2.Peter is 15 years old.Three years ago,his younger sister Michaelle was half Peter's age.How old is Michaelle now?
3.why is room full of married people empty?
2.Peter is 15 years old.Three years ago,his younger sister Michaelle was half Peter's age.How old is Michaelle now?
3.why is room full of married people empty?
1.Mary is 12 years old.two years ago,she was twice as old as her brother Jack.How old is Jack now?(12-2)/2+2=7
How old will Mary be when Jack is twice his present age? 7*2+5=19
2.Peter is 15 years old.Three years ago,his younger sister Michaelle was half Peter's age.How old is Michaelle now?
(15-3)/2+3=9
3.why is room full of married people empty?
这个不会。