UNIT SIX I HAVE FIFTY MARKERSLesson 21NEW WORDS七十seventy八十eighty九十ninetyListen, look and learnLET’S LEARN…Who can guess the missing number? Who can guess the missing number?It’s so easy! Two minus one is one.2-1=1 Who can guess the missing number?It’s so easy! Three minus one is two.3-1=2Who can guess the missing number?It’s so easy! Three minus two is one.3-2=1 Who can guess the missing number?It’s so easy! Thirty minus twenty is ten.30-20=10 Who can guess the missing number?It’s so easy! Thirty minus ten is twenty.30-10=20 Who can guess the missing number?It’s so easy! Sixty minus twenty is forty. 60-20=40 Who can guess the missing number?It’s so easy! Sixty minus thirty is thirty.60-30=30 Who can guess the missing number?It’s so easy! Sixty minus forty is twenty.60-40=20 Who can guess the missing number?It’s so easy! Sixty minus fifty is ten.60-50=10Game Time!记忆大比拼！ 老师将单词卡片按照随意顺序摆好，学生记忆，之后老师随意打乱顺序，学生根据记忆将单词还原。Homework1.Remember these new words.2.Read the dialogue to your parents. Thank you.
