20以内数的排列优质PPT.ppt
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20以内数的排列,数射线,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,16,13,数射线,0,1,2,5,10,15,20,4,7,12,18,3,6,8,11,13,在数射线上找数宝宝,9,14,16,17,19,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,13,16,按规律揭数,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,13,16,双数:
@#@2,4,6,8,10,12,14,16,18,20,0,,单数:
@#@1,3,5,7,9,11,13,15,17,19,猜数游戏,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,16,13,1)比10小2的数是几?
@#@,10-2=8,2)比10大9的数是几?
@#@,10+9=19,3)比18大10的数是几?
@#@,18-10=8,4)比20小10的数是几?
@#@,20-10=10,找规律,579()(),11,13,()()141618,10,12,147()(),10,13,0510()(),15,20,120219()(),18,3,今天你学了什么?
@#@,