Câu 7. NUMBERS (Các số)

a. Write the words for the

1 one , 5 five , 8 eight, 10 ten , 20 twenty , 30 thirty , 50 fifty , 70 seventy , 90 ninety , 100 one/a hundred .

b. four 4 , seven 7 , nine 9 , eleven 11 , fifteen 15 , twenty - five 25 , sixty 60 , seventy - five 75 , eighty 80 .