20以内进位加法和退位减法练习1500题

-16-9= 12-5= 5+6=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7=16-9= 12-5= 5+6= 14-7=11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5=12-8= 9+5= 7+9= 16-8= 9+3=7+7=7+6= 13-9= 8+8= 17-9= 6+7= 11-9=8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9= 12-7= 3+8= 6+8= 12-4= 9+4= 15-9= 13-4= 11-6= 6+6= 11-5= 11-4= 15-6=11-8= 11-2=4+7=4+8=13-8= 15-8= 9+8= 13-6= 7+8=14-6= 8+6=14-8=5+7= 16-9= 12-5= 5+6= 14-7= 11-3= 8+7= 6+9= 15-7= 12-3= 5+8= 9+9= 13-5= 12-8= 9+5= 7+9= 16-8= 9+3=7+7= 7+6= 13-9= 8+8= 17-9= 6+7= 11-9= 8+5= 14-5= 7+5= 16-7= 8+9=5+9= 18-9= 4+9= 6+5= 13-7= 8+3= 9+2=7+4= 11-7= 9+6=9+7=8+4= 14-9= 12-9= 3+9= 17-8= 12-6= 2+9=. z