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Diplomatic International School

Studying forum of the D.I.S. school in Riyadh
 
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T. RANDA EL SHALL




Posts : 47
Join date : 2010-01-29

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PostSubject: good morning   good morning I_icon_minitimeSun Jan 31, 2010 2:06 pm

good morning Icon_bounce good morning Herz Good morning my dearest students

Really I miss you soooo much if you want any help just tell me

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noor

noor


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Join date : 2010-01-28

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PostSubject: Re: good morning   good morning I_icon_minitimeTue Feb 02, 2010 2:54 am

good morning Icon_flower halooooooooooooooooooooo
mrs.Randa..............
I am joudy
i love you good morning Lol

I do not understand using mental math good morning Icon_question

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T. RANDA EL SHALL




Posts : 47
Join date : 2010-01-29

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PostSubject: hi Joudy   good morning I_icon_minitimeTue Feb 02, 2010 12:59 pm

Hi Joudy my sweety

How are you

Using mental math (for example 76 - 39)

You can change numbers to tens to make subtraction problems easier

There are two ways

One way to make this problem simpler is to change 39 to 40 then , THEN add 1 to the result

1- 76 - 40 = 36 (we add 1 to 39 to be40)

2- 36 + 1 = 37 (so we should add 1 to the result )

Another way is to to add the same amount to each number

76 (+1) - 39 (+1)

77 - 40 = 37

So , 76 – 39 = 37 ( the same answer)


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PostSubject: Re: good morning   good morning I_icon_minitime

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