课件15张PPT。UNIT 3Lesson 15LET’S DO MATH123456onetwothreefourfivesixLook and learn789101112seveneightnineteneleventwelveCount and sayHow many erasers?4+3=7Four plus three is seven.How many pencils?5+6=11Five plus six is eleven.How many pens?5+3=8Five plus three is eight.How many rulers?5+5=10Five plus five is ten.How many erasers?5+7=12Five plus seven is twelve.How many books?3+2=5Three plus two is five.How many erasers?4+2=6Four plus two is six.How many books?3+1=1Three plus one is four.How many pens?5+2=7Five plus two is seven.How many pencils?4+7=11Four plus seven is eleven.How many rulers?3+6=9Three plus six is nine.Homework: 回家用英文从一数到十二，数给 爸爸妈妈听，并用英文做几道算 术题给爸妈看看。
