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=
7-4= 6-0= 5-2= 10-9= 10-8= 8-2=
5-3= 7-2= 9-1= 7-1= 8-5= 6-3=
6-5= 7-4= 7-6 = 10-8= 10-3= 5-3=
8-2= 8-6= 8-5= 8-3= 5-4= 5-1=
10-3= 10-2= 5-2= 7-3= 6-4= 8-4=