小学一年级口算题:一年级口算练习39 10-2= 7-2= 6-4= 9-2= 10-9= 5+5= 5+2= 9-4= 8+1= 2-1= 4+6= 2+7= 9-5= 3+3= 4-2= 10-4= 1+2 5-3= 0+8= 10-7= 2+4= 6-5= 4+4= 5-1= 1+9=