初中英语C Helping trees (Reading & Grammar in use)背景图课件ppt

这是一份初中英语C Helping trees (Reading & Grammar in use)背景图课件ppt，共25页。PPT课件主要包含了Percentage，Decimal，Fraction，“and”，singular，a comma，three，thousand，hundred，million等内容，欢迎下载使用。
Learning bjectives
通过本课时学习，学生能够：1. 准确认读、拼写基数词、序数词、小数、分数和百分数；2. 熟练掌握不同类型数词的表达规则，并能正确运用这些规则；3. 运用不同数词描述植物特征，感受数词在准确表达信息方面的作用， 树立保护植物的责任感。
Play a game
Wrk in grups and play the Seven Game.
Rules:1. Players take turns t cunt, starting frm 1.2. When a number cntains the digit 7 (e.g., 7, 17, 27) r is a multiple f 7 (e.g., 14, 28), the player must skip (跳过) that number and say the next ne.3. If a player says a number that shuldn’t be said, he/she lses the game.
Can yu remember the amazing numbers abut the Amazn Rainfrest?
Can yu spell ut these numbers in full?
D yu knw any ther amazing numbers abut the Amazn Rainfrest?
The Amazn is the secnd largest frest in the wrld after the taiga (breal frest).
The Amazn Rainfrest is hme t abut ten per cent f the knwn species n Earth.
An area f ne thusand and three hundred ftball fields f the Amazn is destryed every day.
Mre than a half f the Amazn’s tree species are still undiscvered by science.
1. Abut sixty per cent f the rainfrest is in Brazil.2. It cvers abut six pint seven millin square kilmetres.3. Peple can find nearly fifty thusand kinds f plants and abut tw thusand and fur hundred kinds f freshwater fish here.4. It cntains ne fifth f the wrld’s liquid fresh water.5. The Amazn is the secnd largest frest in the wrld after the taiga (breal frest).
What are these numbers?
Cardinal numbers
Ordinal numbers
Can yu find anything in cmmn amng these numbers?
Observe and summarize
Let’s review
Review the fllwing numbers.
100101185315999
nine hundred and ninety-nine
ne hundred and ne
ne hundred and eighty-five
three hundred and fifteen
一千 1,000 一百万 1,000,000 十亿 1,000,000,000
We use __________ between the hundreds and tens.
We use __________ between the hundreds and tens.“Hundred” stays __________ when used with plural numbers.
We ften use __________ r a space t separate big numbers int grups f _____ frm right t left.
Read the numbers and cmplete the table.
第一个逗号“,”前为thusand第二个逗号“,”前为millin第三个逗号“,”前为billin
Lk and write
Read and cmplete the table.
twenty-secnd
ne hundredth
Can yu find anything in cmmn amng these rdinal numbers?
Read ut the cardinal number the pinter lands n. Then say and spell ut its rdinal number.
There is a magical tree in the frest. Last year it was nine pint seven eight meters tall, but nw it is _________________ meters tall, and it has grwn by ________________ meters. There was a little squirrel playing in the big tree every day. It fund that...
ten pint zer three
zer pint tw five
Hw can we read r write decimals in full?
cardinal number
each number
1. The decimal pint “.” is read as _________.2. “0” is read as _________.
There is a magical tree in the frest. Last year it was nine pint seven eight meters tall, but nw it is ten pint zer three meters tall, and it has grwn by zer pint tw five meters. There was a little squirrel playing in the big tree every day. It fund that...
ne half r a half
a (ne) quarter r a (ne) furth
Can yu change these fractins int percentages?
50% / fifty per cent
25% / twenty five per cent
“%” is ften read r written as ____________.
fifteen per cent
sixty per cent
thirty-fur pint seven per cent
tw hundered and six pint frty-eight per cent
Read the fllwing sentences and write dwn the numbers in Arabic frms.
(1) The Amazn Rainfrest cvers abut six pint seven millin square kilmetres.
(2) Frests cver abut thirty-ne per cent f the Earth’s land area.
(3) There are ver ne hundred lakes in the Jiuzhaigu Valley.
(4) The Amazn Rainfrest cntains ne fifth f the wrld’s liquid fresh water.
Tick (√ ) the ne(s) that yu agree with.
In the abve cntext, we use numbers t ... shw a specific amunt. take a measurement. make smething easier t understand.
Cmplete each f the sentences with ne number in the bx. Spell ut the numbers in full.
(1) Mre than _____________________ f all peple utside cities live within 1 kilmetre f a frest.(2) Currently, the tallest tree is a cast redwd. It reached __________________________ __________ metres in 2019.(3) The ldest tree is a bristlecne pine. It is ver __________________________ years ld.(4) Abut _________________ f the Amazn Rainfrest was destryed by human activities in the last half century.
three furths/quarters
fur thusand eight hundred
seventeen per cent
Wrk in pairs and talk abut the plane tree accrding t the infrmatin belw.
e.g. The plane tree can grw up t 40 metres tall.
The plane tree is a remarkable tree. Its leaves are quite large, with a length ranging frm 10 t 24 centimetres. It has an impressive height. Sme can grw up t 40 metres. When it cmes t the trunk, it can be up t arund 1.3 metres in width. This makes the plane tree a very big and eye-catching tree in the areas we live in.
develp a strnger sense f respnsibility fr plant prtectin.
After learning this lessn, I can
use numbers t describe the features f plants like the plane tree.
write and read numbers in different frms crrectly.
Cardinal numbers Ordinal numbersDecimalsFractinsPercentages
1. Write dwn yur reprt.2. Write a shrt passage abut anther tree r plant, using five different types f numerals t describe it.