十几减几减法表10-1= 10-1= 10-2= 10-3= 10-4= 10-5= 10-6= 10-7= 10-8= 10-9=11-2= 11-2= 11-3= 11-4= 11-5= 11-6= 11-7= 11-8= 11-9= 12-3= 12-3= 12-4= 12-5= 12-6= 12-7= 12-8= 12-9= 13-4= 13-4= 13-5= 13-6= 13-7= 13-8= 13-9= 14-5= 14-5= 14-6= 14-7= 14-8= 14-9= 15-6= 15-6= 15-7= 15-8= 15-9= 16-7= 16-7= 16-8= 16-9= 17-8= 17-8= 17-9= 18-9=
