Grammar (1) Cardinal and ordinal numbers 基数词和序数词 (2) Instructions about numbers 数字的简单运算

What is cardinal numbers? 是表示目的的词，简单来说我们用基数词来数数，表示单位个数，数目；基数词有1,2,3,4… one two three four…

在基数词中，表示几百，几千等时，英文中的“百，千，百万”等后不加s。如:300写成 “three hundred” E.g. About ______ films were shown during the 15th Shanghai International Film Festival. A. two hundred of B. two hundreds of C. two hundred D. two hundreds.

Read the numbers and find rules

thousand million and

数字读法： 英语数字中读法是三位一分，只有百，千，百万，十亿，万亿，而且在写较大的数字时，一般在百位和十位中间加“and”. 如34,567读成 “thirty-four thousand, five hundred and sixty-seven”

What is ordinal numbers? 简单来说是用来表示顺序，有“第几”之意，如: 第一; 第二；第三… the first; the second; the third… 序数词的构成一般是在基数词的后面加上“th”,但也有例外的，如first, second and third.

--th

first 2 third fourth twelfth 19 twenty -third twenty-eighth

1.―How long is the river? ―It’s________meters. A. about three hundred and seventeen B. about two hundreds and forty-five C. more than two hundreds D. less than three hundreds and seventy 2.―Can you write the number eighty-four thousand, six hundred and twenty-six? ―Yes, it is__________. A. 84662 B. 84626 C. 48662 D. 48626

3. －How many students are there in your school? －There are __________. A. the six hundred and sixty-five B. six hundred sixty-five C. six hundreds and sixty-five D. six hundred and sixty-five 4. Han Meimei is ________to arrive at school today. No one arrived earlier than her. A. the one B. the first C. first one D. 1st

“加减乘除”的表达： 加：add; plus 减：subtract; minus 乘：multiply 除：divide (其中plus, minus为介词，其余为动词，及物动词)

B Instructions about numbers Add A and B. Subtract B from A. Multiply A by B. Divide A by B. A plus B equals/is C. A minus B equals/is C. A multiplied by B equals/is C. A divided by B equals/is C.

16 ivided 4 4 16÷4=4 9 lus 6 15 9+6=15 dd ivide 14 lus 4 ivide 2 ubtract from 13 inus 5 8 13-5=8 ultiply by 7 ultiplied 8 56 7×8=56 ivide by 16 ivided 4 4 16÷4=4 dd and 9 lus 6 15 9+6=15 dd ivide 14 lus 4 ivide 2 9 (14+4) ÷2=9

Language points 1. Multiply 7 by 8 “7乘以8”, 其中multiply是及物动词 2. “7 multiplied by 8 is 56”中，is是谓语动词；multiplied在这里是过去分词表被动

Tips 1.我们把数看成一个整体，所以在进行数字运算得出结果时，谓语动词用单数is/equals（等于） 2. 下列选项能正确表达“11+1=12 ” A: “11 add 1 is 12.” B：“11 plus 1 equals 12.” 因为add 和is 都是动词；plus是介词

Correct the mistakes 2 plus 5 is 7 7 minus 3 is 4. 1. 2 add 5 is 7. ______________________________________. 2. 7 subtract 3 is 4. 3. 25 divide by 5 equal 5. 4. Multiply 3 by 9 equal 27. 2 plus 5 is 7 7 minus 3 is 4. 25 divided by 5 equals 5. 3 multiplied by 9 equals 27.

1. －_______7 by 8. －7 ______by 8 equals 56. A. Multiply; multiplied B. Multiply; multiply C. Multiplied; multiply D. Multiplied; multiplied 2. About ______ films were shown during the 15th Shanghai International Film Festival. A. two hundred of B. two hundreds of C. two hundred D. two hundreds.

3. －My father’s __________ birthday is coming. －So we will put 42 candles on the cake. A. 42 B. the 42th C. the fourty-second D. fourty-second 4. －Add 23 and 5. －23______5 ______28. A. adds; is B. plus; is C. plus; are D. add; is