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。