题干
算一算，你发现了什么？
9+2=____ 10+1=____ 9+7=____ 10+____=____
9+3=____ 10+2=____ 9+____=____ ____+____=____
9+4=____ 10+3=____ 9+____= ____ ____+____=____
9+5=____ 10+____=____ ____+____=____ ____+____=____
9+6=____ 10+____=____ …… ……
答案(点此获取答案解析）
11,11,16,6,16,12,12,8,17,10,7,17,13,13,9,18,10,8,18,14,4,14,9,10,19,10,9,19,15,5,15
