小学一年级口算题：基础口算题 11-9= 15-8 =12-8 = 14-8= 18-9= 14-10= 16-10= 17-8= 11-8= 13-8= 15-9= 18-7= 16-9= 12-9= 16-8= 14-8= 18-8= 13-9= 14-9= 17-9=
