一年级数学20以内的不退位减法口算题

一年级数学20以内的不退位减法口算题16-5= 16-3= 19-8= 14-0= 19-1= 12-1= 16-2= 16-4=19-2= 12-0= 18-4= 19-1= 15-4= 14-0= 16-5= 17-3= 18-5= 19-0=17-6=19-0= 16-5= 17-3= 15-3= 12-1= 19-3= 14-1= 15-4= 17-1= 11-0= 18-0= 19-7= 17-0= 19-3=16-2=17-3= 17-2= 18-1=14-0= 19-7= 18-2= 12-0= 17-1= 17-4= 18-2= 19-8= 14-1= 19-3= 17-6= 16-1= 17-6= 15-3= 17-0= 19-2= 16-4= 18-4= 13-1= 13-0= 17-5= 18-1=16-2= 17-6= 11-0=18-4= 19-7= 17-5= 19-2= 13-1= 19-6= 19-1= 16-5= 17-2= 16-4= 16-3= 18-3= 19-4= 19-3= 18-1= 13-1= 19-2= 19-5= 16-4= 18-2= 17-5= 19-1= 16-3= 12-0= 17-1= 18-3= 19-6= 13-1= 13-0= 13-0= 17-2= 17-4= 14-0= 18-0= 18-4= 17-2= 18-3= 18-5=