2000题20以内连加连减口算练习题.docx++++++OIIIIIIIIIIII+ + + + + + ^I I I I I II II II II II++++++O++i++++OoOOoIIIIIIIIIIIIIIIIIIIIIIIIOO +++++++++++iOoOiIIIIIIIIIIIIIIIIIIIIII i+++++++++++oOo ++++++++++++OOOOIIIIIIIIIIIIIIIIIIIIIIIIi ++++++++++++OoO+i++++ro++O+Fo+++oIIIIIIIIIIIIIIIIIIIIIIO+++++++++++Ooo++ro+Vo+++++++++OOIIIIIIIIIIIIIIIIIIIIIIIIOoO++++++++++++++iO++i++ +++++OiIIIIIIIIIIIIIIIIIIIIIIO+++++++++++OooOOOOiOIIIIIIIIIIIIIIIIIIIIII ++++++++++++OOIIIIIIIIIIIIIIIIIIIIIIII++++++++++++oOoooO+++++++++++OiOiIIIIIIIIIIIIIIIIIIIIIIO +++++++++++iOO ++++++++++++oiIIIIIIIIIIIIIIIIIIIIIIIIO++++++++++++Oo++ro+++ro++++++iOOoIIIIIIIIIIIIIIIIIIIIII+++++++++++O++++++++++++OOOOoOIIIIIIIIIIIIIIIIIIIIIIII++++++++++++OO
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