口算。( )+5=6 ( )+4=7 3+( )=7 ( )+2=54+( )=6 ( )+7=7 ( )+6=7 1+( )=66+( )=6 ( )+2=7 ( )-3=4 3+( )=72+5= 3+2= 3+4= 3+4=3+2= 5+1= 0+6= 3+1=5+1= 5+2= 5+1= 6+1= 4+3=
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