【数学】口算练习（7）

口算练习（7）3-1= 4-3= 4+6= 7+2= 2-2=6+3= 4+5= 4+4= 9+1= 3-1=3-1= 2-2= 6+3= 7+2= 9-6=2-2= 6-6= 6+3= 7+1= 5+0=4-2= 5-2= 7-0= 0+3= 9+1=4+1= 4+3= 6+2= 2-1= 5+5=4-2= 7+3= 4+4= 6-6= 4+3=4+1= 3+1= 6-1= 8-0= 7-2=8-3= 3-1= 8+2= 5+2= 5-4=8+1= 7+1= 8-5= 7+3= 5+4=8-8= 4-4= 6-5= 7+0= 5+4=9+0= 2-1= 8-7= 6-2= 2-1=6-5= 7+2= 2+5= 7-4= 8-1=3+3= 3-3= 9-8= 2-2= 7-7=5+2= 9-2= 5-4= 2-2= 4-4=9+1= 5+3= 5+5= 9-8= 9+1=6-3= 4-2= 9+1= 6-4= 3+3=6+1= 9-7= 3+3= 6-4= 7+2=6-3= 3-3= 5+5= 8-1= 4+5=9-4= 5-4= 7+1= 7-2= 3+7=