七年级英语上册 CHAPTER FOUR The world of numbers课件 深圳牛津版 课件VIP免费

ReadingReadingListeningListeningLanguageLanguageSpeakingSpeakingWritingWriting A What do you know about… We all use numbers in our daily life. Numbers are an international language. What do you know about the language of numbers? Learn the following: A decimal number is written as a dot.eg. 0.65 (zero point six five/ sixty-five) 8.08 (eight point o eight.)Read the following:7.53, 3.42, 0.01, 86.201 a decimal number( 小数） Odd numbers cannot be divided by two to give a whole number without a fraction. 2 odd numbers ( 奇数） 3 even numbers ( 奇数） Even numbers can be divided by two to give a whole number. A fraction is the exact division of a number. eg. ½ : one half 2/3: two thirds ¼ a quarter 1/10 one tenthRead the following:3/5, 6/11, 1/8 4 a fraction ( 分数） 5 plus , add ( 加） ２＋５＝７Two plus five is seven.Two and five is seven.Two added to five is seven.3+ 12 =?What is 3 plus twelve? Read the following:25 + 24 = 49 30 + 12 = ? 6 minus ( 减，减号，负号） subtract ( 减 )12-3=9Twelve minus three is nine.Three subtracted from twelve is nine. Read the following:2-2=0 19- 12=7 97-65=? 7 times, multiply 乘２ × ３ ＝６Two times three is six.Two and three multiply makes six.Two multiplied by three makes 6. Read the following:16 × 4 = 64 5 × 3 = 15 8 divide 除30÷ 6 = 5Thirty divided by six is five.Read the following:20 ÷ 4 = 5 18 ÷ 3 = 6 45% = 90oa percentageequalsa number showing degrees Match the words with the pictures, signs and numbers. 1 a demical number2 a pair of odd numbers3 a fraction4 zero5 add; plus6 subtract; minus 7 multiply, times8 divide9 a number showing degrees10 a percentage11 a pair of numbers12 equalsA What do you know about…jfcbalidhkge 1 ...