Unit3Numbers第一課時(shí)Singasong.

>>PresentationListenandsaytherhyme.One,two,three,four,Five,six,seven,Eight,nine,ten,Andnoweleven,Twelveistwoplusten,Nowlet’sstartagain.Readandwrite.12twelvefourteensixteeneighteen14?1816

20twentyLookandlearn.

five5fifteen15fifty50

three3thirteen13thirty30

four4fourteen14forty40

two2twelve12twenty20

nine9nineteen1990

seven7seventeen1770

eight8eighteen1880

six6sixteen1660sixtyseventyeightyninety

100a

hundredListenandsay.Whatcanyoufind?(你能發(fā)現(xiàn)什么)12

twelve20

twenty13

thirteen30thirty14

fourteen40

forty15

fifteen50fifty16

sixteen

60

sixty17

seventeen70

seventy18

eighteen

80

eighty19

nineteen

90

ninety一至十二形各異，一個(gè)一個(gè)單獨(dú)記。后面加teen變十幾，thirteen，fifteen看仔細(xì)。幾十加ty，twenty不同重點(diǎn)記。forty沒(méi)有字母u，thirty,fifty更出奇。eighteen，eighty只有一個(gè)t。十位個(gè)位短橫接，表示幾十幾。Canyousay?twenty-one21twenty-two22twenty-three23

twenty-four24

twenty-five25

twenty-six26

Dothesum.20+40and|plus

=?What’s

twenty

and(plus)

forty

?It’s

sixty

.Practice:30+50=18+48=What’s

and(plus)

?It’s

.thirtyfifty??eighty80eighteenforty-eight66sixty-six

Dothesum.60-40minus

=?What’s

sixty

minus

forty

?It’s

twenty

.Practice:24-5=90-30=What’s

minus

?It’s

.twenty-fourfive??nineteen19ninetythirty60sixtyDothesumsinEnglish.37+43=19+17=??What’s

and(plus)

?It’s

.62-32=50-38=??80363012What’s

minus

?It’s