Unit 4 The World of Numbers
(2) “odd”, “even”: thirteen is an odd number. twelve is an even number. (3) “multiply…by…”. “…times…equals…”, “nearly”: multiply twenty-five by four. we get one hundred. twenty-five times four equals one hundred. t: in fact, we have ninty-nine students in our grade. so it’s nearly one hunderd. (4) “invent”, “invention” (5) “calculate”, “calculator” (show a picture of electronic calculator) (6) “abacus”, “bead”, “wire”, “bottom” (show a picture of abacus) 4. ask the students to look at the screen and read the above new words and expressions aloud.(1min) 5. do exercise a1 (guide the students to understand the requirements first) (2mins) 6. reading ø pre-reading (5mins) ask the students to read the questions in page 51. ø reading (10mins) read the text in page 50 and answer the questions in page 51. ø after reading (4mins) check the answer in page 51 ask the students: what is the answer in line9, page 50. 7. summing up (1min) 8. homework (1min)