Unit 3 Let’s do math! LESSON 16 课件 (共15张PPT)

课件15张PPT。UNIT 3 LET’S DO MATHLESSON 16 13~19皆以后缀-teen结尾 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen Look and learn13141516Again thirteen fifteen fourteensixteen18171920seventeen eighteennineteen twenty Let’s do it￥15￥2I want do buy a book and two pencils. The book is 15 Yuan. The pencils are 4 Yuan. How much money do I need?15+4=19 Fifteen plus four is nineteen. You need nineteen Yuan.I want do buy a pen and three erasers. The pen is 14 Yuan. The erasers are 3 Yuan. How much money do I need?￥1￥1414+3=17 Fourteen plus three is seventeen. You need seventeen Yuan.I want do buy a pencil case and one ruler. The book is 13 Yuan. The ruler is 3 Yuan. How much money do I need?￥3￥1313+3=16 Thirteen plus three is sixteen. You need sixteen Yuan.I want do buy a pencil case and two pencils. The book is 13 Yuan. The pencils are 4 Yuan. How much money do I need?￥13￥213+4=17 Thirteen plus four is seventeen. You need seventeen Yuan.Practice 1. Thirteen plus one is_____?2. Thirteen plus four is_____?3. fifteen plus four is_____?fourteenseventeennineteen4. Sixteen plus two is_____?5. Seventeen plus three is_____?4. Twelve plus one is_____?eighteenthirteentwentyHomework: 回家后用英文从十三数到二十， 数给爸爸妈妈听。