1. 6 3/11: (9 3/8-7 1/2+11/20+3 23/40) * 5 1/2*1 15/23;

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1 октября, 16:58

1. 6 3/11: (9 3/8-7 1/2+11/20+3 23/40) * 5 1/2*1 15/23;

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6 3/11: (9 3/8-7 1/2+11/20+3 23/40) * 5 1/2*1 15/23 = 1 220/407

1. 9 3/8-7 1/2=2 (3/8-1/2) = 2 (3-4/8) = 2 (-1/8) = 1 7/8

2. 11/20+3 23/40=34 (11/20+23/40) = 34 (22+23/40) = 34 45/40=35 1/8

3. 1 7/8+35 1/8=37

4. 6 3/11:37=69/11:37=69/407

5. 69/407*5 1/2=69/407*11/2=69*11:407*2=

=759/814

6. 759/814*1 15/23=759/814*38/23=759*38:

:814*23=627/407 = 1 220/407