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http://xristx.blogspot.gr/

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Xristos eva-edu

Xristos

:. 02/11/11

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2. : , , . 8 40 = 320 60 20 = 120 6 200 = 40 300 = 3 3.000 = 90 200 =

3. : - , , - , - . . 15 3 = ( 10 3) + ( 5 3) = 30 + 15 = 45

18 5 =

218 4 = (200 4) + (10 4) + ( 8 4 ) = 800 + 40 + 32 = 872

332 6 =

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4. 1, 2, 3 .

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/ 2 / 5 / 10

1 2 = 2 1 5 = 5 1 10 = 10

2 2 = 4 2 5 = 10 2 10 = 20

3 2 = 6 3 5 = 15 3 10 = 30

4 2 = 8 4 5 = 20 4 10 = 40

5 2 = 10 5 5 = 25 5 10 = 50

6 2 = 12 6 5 = 30 6 10 = 60

7 2 = 14 7 5 = 35 7 10 = 70

8 2 = 16 8 5 = 40 8 10 = 80

9 2 = 18 9 5 = 45 9 10 = 90

10 2 = 20 10 5 = 50 10 10 = 100

11 2 = 22 11 5 = 55 11 10 = 110

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8 15 = 8 10 + 8 5 = 12 15 = 10 15 + 2 15 = 10 + 5 = 80 + 40 = 120

10 + 2 = 150 + 30 = 180

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6 18 = 13 19 = + +

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610= 45100= 811000=

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427 X 5=() + () + () = + + =

278 X 9=() + () + () = + + =

x 10 170 x 10 x 100 1.700 x 100

x 1.000 17.000 x 1.000

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5, 10, 12, 15, 17, 20, 23, 25

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120 (20 X 6)

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3. . 54 9 = (50 + 4) 9 = (50 9) + (4 9) = 450 + 36 = 486 68 7 = . 36 8 = . 91 6 = . 88 5 = .

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23 4 10 92 10 920

38 70 46 90

24 300 53 600 87 500

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01 2.9. 02 1 mathimatika102 202 3 enotita902 4 enotita9b02 5 - . 902 6 202 7 02 8 documents.tips_-9-55720b6c497959fc0b8c2348202 9 random-131003140946-phpapp0103 pol9