问题 选择题 算一算，选一选。( ) 1. 9 －8 = ( ) 2. 2 + 3 = ( ) 3. 10 －6 = ( ) 4. 7 －5 = ( ) 5. 6 －3 = ( ) 6. 8 －3 =A. four B. one C. five D. three E. twoF. five 答案 1. B 2. C / F 3. A 4. E 5. D 6. F / C
