闽教版五年级下册序数词教法

课件13张PPT。序数词序数词表示次序的数词叫序数词，是由基数词变化而来的。1 one -----first
2 two------second
3 three----third
4 其余的序数词是由基数词后加-th 变化而来。几个特殊变化的序数词1 five----fifth
2 twelve----twelfth
3 eight----eighth
4 nine----ninth 整十的序数词把 y 变成 i加-eth1 twenty----twentieth
2 thirty----thirtieth
3 forty----fortieth
4 fifty -----fiftieth
5 你能写出 sixty seventy eighty ninety 的序数词吗？你对了吗？1. Sixty----sixtieth
2. seventy---seventieth
3.eighty----eightieth
4,ninety----ninetieth几十几的序数词，十位数不变，个位数变成序数词。1. twenty-one 21----twenty-first 21st
2.thirty-two 32-----thirty-second 32nd
3.ninety-nine 99----ninety-ninth 99th
4 .请写出66 83 48 55的序数词。日期的表达 dateWhat’s the date today?
It’s March 28th.（ 1879.3.14-1955.4.)EinsteinHis birthday is
March 14th.Lu Xun. His birthday is Sept.25th(1881.9.25-1936.10.19)When is your birthday?It’s _______ .
When is Teacher’s Day?It’s Sept.10th.When is Children’s Day?It’s June 1st.When is Christmas Day?It’s Dec.25th