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 t
