1、Lead-in+Two and two is four.=4Lead-in+One plus two equals three.=3Presentation 1.“加加”用用plus,and或或add表示;表示;“等于等于”用用is,equal等词表示。等词表示。Two plus three is five Two and three equals five If we add two to/and three,we get five 数字的加减乘除数字的加减乘除Presentation2.“减减”用用 minus表示表示 Ten minus six is four Six minus two
2、 equals four.Presentation3.“乘乘”用用multiplied by表示表示 Three multiplied by four is twelveTwo multiplied by four equals eight.还可用还可用times表示表示“乘乘”Three times four is twelvePresentation4.除除”用用divided by表示表示 Sixteen divided by four is four Sixteen divided by four equals four Presentation注意:在注意:在四则运算中,表示加法和乘
3、法时谓语四则运算中,表示加法和乘法时谓语动词单、复数动词单、复数均可均可,表示减法和除法时必须用,表示减法和除法时必须用单数。单数。Ten minus one is eleven.Ten times five is/are fifty.Presentation5.小数小数用用基数词来基数词来表示小数点表示小数点读作读作 point,o读作读作 zero或或o/ou/,整数部分为零时,可以省略不读。整数部分为零时,可以省略不读。0.4 zero point four或或point four 零点四零点四 10.23 ten point two three 十点二三十点二三 l.03 one po
4、int o three 一点零三一点零三 Presentation当当数字值大于数字值大于1时,小数后面的名词用复数,时,小数后面的名词用复数,数字值小于数字值小于1时,小数后面的名词用单数。时,小数后面的名词用单数。1.03 meters 一点零三米一点零三米 0.49 ton 零点四九吨零点四九吨 l.5 tons 一点五吨一点五吨 Practice3+9Add 3 and 9.3 plus 9 equals/is 12.Practice9-3Subtract 9 from 3.9 minus 3 equals/is 6.Practice39Multiply 3 by 9.3 multip
5、lied by 9 equals/is 27.Practice93Divide 9 by 3.9 divided by 3 equals/is 3.Practice0.93Divide 0.9 by 3.Point 9 divided by 3 equals/is point 3.Practice填空。填空。1.3 _ 9 equals 12.2.9 _ 3 is 3.3.3 _ 9 equals/is 27.4.18 _ 13 is 6.plus divided bymultiplied by minusPractice【2013.深圳中考深圳中考】_ one plus eleven?A.H
6、ow many is B.What is C.How is D.How old is【解析解析】本题考查本题考查运算运算中提问得数用中提问得数用what,故选故选B直击中考直击中考 B Practice【2011.深圳中考深圳中考】Three minus three _zero.A.is B.are C.equals D.be【解析解析】本题考查四则运算中表示本题考查四则运算中表示减法和除减法和除法时必须用法时必须用单数。故应选单数。故应选A。直击中考直击中考A Practice【2013.邢台中考邢台中考】Be careful.The pond is 0.9 _ deep.A.kilometer B.kilometers C.meter D.meters【解析解析】本题考查小数当本题考查小数当数字值大于数字值大于1时,时,小数后面的名词用复数,数字值小于小数后面的名词用复数,数字值小于1时,时,小数后面的名词用单数。故小数后面的名词用单数。故选选C。直击中考直击中考C Homework1.Do exercise book.2.Speaking up on Page 27.