小学一年级口算题:一年级数学口算题74!
14-8= 10-2= 6+7= 20-15=
20-7= 6+9= 11-9= 10-1=
10-8= 10-8= 11-5= 16-9=
11-9= 9+2= 20-6= 20-8=
12-4= 7+6= 13-6= 6+6=
15-7= 2+9= 6+8= 16-7=
7+9= 15-8= 13-5= 11-2=
20-19= 8+8= 20-18= 8+6=
6+9= 11-7= 10-5= 17-9=
20-7= 13-4= 10-2= 7+6=