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冀教版一年级起点四年级上册《Unit 1 A New School Year Lesson 4 How Many Books Do You Have》优秀教学课件
twenty
How many?
thirty
How many?
forty
How many?
fifty
How many?
eigh
ty
t
Try to work out!
20+40=
60
Try to work out!
15+60=
75
Try to work out!
24+60=
84
Try to work out!
72+23=
95
Try to work out!
86