牛津版 (深圳&广州)八年级上册（2013秋审查）Unit 2 Numbers教学ppt课件

这是一份牛津版 (深圳&广州)八年级上册（2013秋审查）Unit 2 Numbers教学ppt课件，共19页。PPT课件主要包含了numbers， abacus，design，At first，used，Homework等内容，欢迎下载使用。
What d these pictures refer t?
Step 1：warming -up
If there are n written numbers , hw can we cunt things?
tkens made frm clay r small stnes
Step 2：brainstrming
fingers and tes
marks n sticks and bnes
Can yu guess the rder f their ccurring time?
Step 3: predicting
This article mainly talks abut the ____________ f cunting methds.
difference
develpment
Step 4：skimming
Scan the article and then cmplete the flw chart abut the develpment f cunting methds.
their fingers and even their tes
small marks n sticks and bnes
systems f written marks
the Hindu–Arabic system
Step 5：scanning
the rder f their ccurring time
Step 6：Intensive reading
small numbers
At first, peple used their fingers, and even their tes. Hwever they culd nly cunt small numbers in this way.
After that, they began t make small marks n sticks and bnes. This helped them cunt bigger numbers. They used them t cunt things like the days f the mnth, the amunt f fd and the number f animals they had.
began t make
helped…cunt
bigger numbers
the days f the mnth
the amunt f fd
the number f animals
Then peple began t use tkens made frm clay r small stnes. This helped them cunt even bigger numbers. They ften put the tkens n pieces f string s that they culd carry them arund easily. This develped int tls like the abacus.
began t use
even bigger numbers
put…n…develped int
Finally, peple began t develp systems f written marks t shw different numbers, and this led t the Hindu-Arabic system (0-9). We are still using this system tday.
began tdevelp
different numbers
Hindu-Arabic system
Hwever, they culd nly cunt small numbers in this way. This helped them cunt bigger numbers. This helped them cunt even bigger numbers.
Using their fingers and even their tes
Making small marks n sticks and bnes
Using tkens made frm clay r small stnes
What des this refer t?
This develped int tls like the abacus. … and this led t the Hindu-Arabic system (0~9). We are still using this system tday.
Putting the tkens n pieces f string
Develping systems f written marks
The Hindu-Arabic system
This ften refers t smething mentined befre.
(small) marks n sticks and bnes
the Hindu-Arabic system (0-9)
mre and mre advanced
differentnumbers
Step 7：Retell
After that,
Step 8：Further-thinking
fr example
Step 9：Creative stry-making
Chse sme f the pictures belw and then try t make a shrt stry.
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Think f mre ccasins (场合) where we use numbers and then try t make a shrt stry with them.Review the article we learned tday and fill in the blanks.
_____, peple used their _____ and even their _____. Hwever they culd nly cunt _____ in this way. _____, they began t make _____.This helped them cunt _____ . They used them t cunt things like the days f the mnth, the amunt f fd and the number f animals they had. _____ peple began t use _____. This helped them cunt _____ . They ften put the tkens n pieces f string s that they culd carry them arund easily. This develped int tls like the _____. _____, peple began t develp _____ t shw _____, and this led t the Hindu-Arabic system (0-9). We are still using this system tday.