UNIT 3 LETS DO MATH!LESSON 17【学习目标】1学会听、说、读下列词汇:twenty、thirty、forty、fifty、fifty、sixty、seventy、eighty、ninety、one hundred。2学会使用:plus is 【学习重难点】重点:1单词的认读。2功能句的理解。3对课文的理解。难点:1运用功能句型进行表述。2句型:plus is 【学习过程】一、新知学习。1课文预习。阅读课文,将自己不认识的单词写下来。_2学习单词和句型。(1)朗读词汇:twenty、thirty、forty、fifty、fifty、sixty、seventy、eighty、ninety、one hundred。(2)朗读句型:plus is (3)小组活动,练习上述句型。S1: plus is S2: plus is 二、达标检测。1根据给出的信息,填出答案。There were fifty grapes on the dish.My mother took away thirty.How many grapes are left?_2回答问题。(1)Twelve minus five is _.(2)Twenty minus thirty is _.(3)Sixty minus forty is _.