加法:1、two+three=five
2、eight+two=ten
4、two+five=seven
5、twelve+five=seventeen
7、four+one=five
8、thirteen+six=nineteen
9、one+eight=nine
英文写出20以内加减法各10道急求答案,帮忙回答下
加法:1、two+three=five
2、eight+two=ten
4、two+five=seven
5、twelve+five=seventeen
7、four+one=five
8、thirteen+six=nineteen
9、one+eight=nine