牛津苏教三下Unit5Plusandminus第2课时.ppt

Unit5 Plus and minus,13 thirteen,15 fifteen,16 sixteen,18 eighteen,14fourteen,1 7 seventeen,20 twenty,19 nineteen,Guess:Who am I?(我是谁？)我由three个字母组成；我的第一个字母是No.two；第二个字母是No.fifteen；第三个字母是No.twenty-five.,boy,+,plus,five plus two,5+2,2+7,6+9,4+11,1+17,two plus seven,six plus nine,four plus eleven,one plus seventeen,+,plus,Its seven,+,=8,1,2,+,=12,3,+,=10,Do the exercises:,20-4,twenty minus four,4-3,9-6,7-2,four minus three,nine minus six,seven minus two,What nine minus four?,Its five,9-4=?,Whats eight minus two?,Its six.,11-6=,9-4=,7-2=,12-8=,10-1=,14-7=,6-4=,13-5=,8,9,7,4,5,2,9-2=,7-4=,11-2=,15-5=,17-6=,20-8=,Homework:1.听录音跟读Unit5课文3遍。2.用加减法的算式编写一组对话和同桌交流。,