Lesson 4 Welcome to the Dog ShowFattyHattyWelcome to the dog show!Find out the numbers.找出图中的数字。116597410238Find out the rule.找出以下数字的发音规律。31330144015501660177018801990Lets do sums.一起计算总和。420121plusisWhats 20 plus 1？-Its 21.20加1等于多少？等于21。20+1=2120+2=30+3=40+4=70+5=90+10=100A:Whats.plus.?B:Its.22334475Can you say it in English?你能用英语说出它吗？5Can you say it in English?2 plus 1 is 3.2+1=33+2=54+3=75+4=9 2 minus 1 is 1.2 -1=13-2=14-3=15-4=1minusYes,I can.Choose numbers,“+”or“-”and“=”.组成等式并读出。1 1 2 +-=1+1=
