Question

7 1/3 * ? * = 7 1/3
1 2/5 * 5/7 * ? = 7/5

1 5/7 * (3 * 2 7/12)
4 1/6 * 1 1/5 : 4
3 1/4 + 5 1/3 * 4 3/4
1 1/7 * 1 3/4 - 5 3/5 * 10/56
5,5 * 2 1/2 * 2,5 * 2 1/2

Answer 1

7  1/3 * 1 = 7  1/3

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1  2/5 * 5/7 * ? = 7/5

7/5  * 5/7  * ?  = 7/5

1* ? = 7/5

1 * 7/5 = 7/5

-----------------------, bo 1  2/5  = 7/5

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1  5/7 * ( 3 * 2  7/12) = 12/7 * ( 3 * 31/12) = 12/7 * 93/12 = 93/7 = 13  2/7

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4  1/6 * 1  1/5  : 4 = 25/6  * 6/5  : 4 = 25/5 : 4 = 5 : 4 = 5/4 = 1  1/4

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3  1/4 + 5  1/3 * 4  3/4 = 13/4 + 16/3 * 19/4 = 13/4 + 4/3 * 19/1 =

= 13/4 + 76/3 = [13*3]/12 + [4*76]/12 = 39/12 + 304/12 = 343/12 =

= 28  7/12

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1  1/7 *  1  3/4  - 5  3/5 * 10/56 =

= 8/7  * 7/4  - 28/5 * 10/56 =

= 8/4 - 2/2 = 2 - 1 = 1

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5,5 * 2  1/2 * 2,5  * 2  1/2 = 5  1/2 *  2  1/2  * 2  1/2  * 2  1/2 =

= 11/2 * 5/2 * 5/2 * 5/2 = 55/4 * 25/4 = 1375/16 = 85  15/16

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Zamiana liczb mieszanych na ulamki niewlaściwe

3  1/4 = [3*4 + 1]/4 = [12 +1]/4 = 13/4

1  1/7 = [1 *7 + 1]/7 = [7 + 1]/7 = 8/7

5  1/3 = [ 5*3 + 1]/3 = [ 15 + 1]/3 = 16/3

4  3/4 = [4*4 + 3 ]/4 = [16 + 3]/4 = 19/4

itd.

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