计算.
口算。6-5= 5-1= 7-1=7-4= 3-3= 7-5=4-1= 6-3= 6-4=7-7= 7-2= 7-6=7-3= 6-3= 5-4=6-2= 7-2= 7-3=7-4= ( )-4=2 6-( )=2( )-3=4 6-( )=3 7-( )=3
口算。7-3= 6-3= 5-4= 7-2=7-2= 6-2= 7-2= 6-4= 7-4=6-4= 5-4= 7-5= 6-2= 7-7=7-4= 5-3= 6-5= 5-1=7-4= 3-3= 7-5= 7-( )=5 ( )-3=2( )-0=6 6-( )=1 ( )-6=1
口算。7-7= 6-3= 7-3= 5-4= 7-4=6-2= 7-2= 6-4= 6-2= 7-2=7-4= 5-4= 7-5= 4-2= 6-4= 5-3=( )-5=2 ( )-3=0 6-( )=23-( )=2 6-( )=4 ( )-1=67-( )=3 ( )-2=4 7-( )=5( )-6=1 ( )-3=4 6-( )=2
口算。7-5= 4-2= 7-4= 5-3= 7-7=6-5= 5-1= 6-4= 3-3= 7-5=4-3= 7-3= 7-7=6-( )=0 ( )-5=1 ( )-3=3( )-4=3 7-( )=4 ( )-5=1( )-2=5 6-( )=2 ( )-1=4( )-4=2 7-( )=2 6-( )=1
口算。( )-3=3 ( )-5=2 7-( )=2 6-( )=1( )-0=6 7-( )=2 7-( )=6 ( )-3=05-( )=2 ( )-5=1 7-( )=7 ( )-3=4 ( )-4=37-7= 7-3= 6-3= 5-4= 7-2= 7-1=6-2= 7-2= 6-4= 7-2= 7-4= 7-4=