8A-Unit2Numbers-grammar(教育精品).ppt

Unit 2 NumbersGrammarGrammarA.Cardinal and ordinal numbers12345678171819201112131415169103040528598onetwothreefourfivesixseveneightnineteneleventwelevethirteenfourteenfifteensixteenseventeeneighteennineteentwentythirtyfortyfifty-twoeighty-fiveninety-eightA.Cardinal and ordinal numbers100375200one hundredtwo hundredthree hundred and seventy-five642958236six hundred and forty-twonine hundred and fifty-eighttwo hundred and thirty-sixA.Cardinal and ordinal numbers100015，3624189one thousandfour thousand one hundred and eighty-ninefifteen thousand three hundred and sixty-two100，000285，643one hundred thousandtwo hundred and fifty-eight thousand six hundred and forty-threeA.Cardinal and ordinal numbers1,000,0003,367,982one millionthree million three hundred and sixty-seven thousand nine hundred and eighty-twoWork out the ruleIn the cardinal numbers,we do not add-s to hundred,_ and _.With large numbers,we put _between hundred and ten.thousandmillionandA.Cardinal and ordinal numbers1st2nd3rd4th5th6th7th8th17th18th19th20th11th12th13th14th15th16th9th10th21st33rd40th100thfirstsecondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwentiethtwenty-firstthirty-thirdfortietyhundredthWork out the ruleWe form most ordinal numbers by adding _to the cardinal numbers.There are exceptions,like first,second and third.thA.Cardinal and ordinal numbers1(2)_3412(6)_2328MayAlanDannyJanePeterAliceSteveZoeMay is the(1)_.Alan is the second.Danny is the(3)_.Jane is the(4)_.Peter is the(5)_.Alice is the nineteenth.Seveve is the(7)_.Zoe is the(8)_.firstthirdfourthtwelfthtwenty-thirdtwenty-eighth219B.Instruction about numbers3+9 9-33*99/3Add 3 and 9Subtract 3 from 9Multiply 3 by 9Divide 9 by 3 3 plus 9 equals/is 12.9 minus 3 equals/is 6.3 multiplied by 9 equals/is 27.9 divided by 3 equals/is 3.3+9=129-3=63*9=279/3=3plus and minus are prepositionsB.Instruction about numbers1.S1:Add 11 and 1.S2:11 plus 1 equals/is 12.(11+1=12)2.S1:S_5_13 S2:_ m_ _ equals/is_.()3.S1:M_ 7 _8.S2:_m_by _equals/is _.()ubtractfrom13inus5813-5+8ultiplyby7ultiplied8567*8=564.S1:D_16_4.S2:_d_ by_ equals/is_.()5.S1:A_ 9 _6.S2:_p_ _equals/is _.()6.S1:A_ 14 and 4 and d_the answer by 2.S2:_p _ _ and d _the answer by _ equals/is _.()ivideby16ivided4416/4=4ddand9lus6159+6=15ddivid14 lus4ivided29(14+4)/2=9