问题 选择题 给下列的算式选择正确的答案。( ) 1. 5 + 6 = __________( ) 2. 9 + 7 = __________( ) 3. 18 - 6 = __________( ) 4. 13 + 7 = __________( ) 5. 14 + 5 = __________( ) 6. 20 - 7 = __________A. thirteenB. nineteenC. sixteenD. elevenE. twelveF. twenty 答案 1-6 D C E F B A