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3 , . , :

43 1,5 (6 . ), .

3 :

43 1,5 (6 . 3 .) = 43 1,5 3 = 43 4,5 = 38,5 .

: 3 38,5 .

 

, , , 8 . :

43 + 0,5 ( 6 .), .

8 :

43 + 0,5 (8. 6 .) = 43 + 0,5 2 = 43 + 1 = 44 .

: 8 44 .

 

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1.

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3 . , , .

 

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1 10 ,

2 :

10 + 2 n, n - .

3 :

10 + 2 3 = 10 + 6 = 16

: 3 16 .

 

 

.

3 , 4 . , :

100 8 (4 n), n - .

3 :

100 8 (4 3 ) = 100 8 1 = 100 8 = 92

: 3 92 .

 

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3 , 10 . , :

63 1,5 (10 n), n - .

3 :

63 1,5 (10 3 ) = 63 1,5 7 = 63 10,5 = 52,5

: 52,5 .

 

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3 , 5 . , :

50 1 (5 n), n - .

3 :

50 1 (5 3 ) = 50 1 2 = 50 2 = 48

: 48 .

 

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12 . , , .

 

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10 , 4 :

30 + 4 (n 10 ), n - .

12 :

30 + 4 (12 10 ) = 30 + 4 2 = 30 + 8 = 38

: 12 38 .

 

.

4 ,

6 :

100 + 6 (n - 4 ), n - .

12 :

100 + 6 (12 - 4 ) =100 + 6 8 = 100 + 48 = 148

: 12 148 .

 

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10 , :

63 + 3 (n 10 ), n - .

12 :

63 + 3 (12 10 ) = 63 + 3 2 = 63 + 6 = 69

: 12 69 .

 





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