А) 2 13/30 - (1 1/10 + 1/5); б) 2 8/15 - ( 1 3/10 + 2/5); в) 4 14/45 - 1 7/15 - 3/5; г) 4...

Question

А) 2 13/30 - (1 1/10 + 1/5);
б) 2 8/15 - ( 1 3/10 + 2/5);
в) 4 14/45 - 1 7/15 - 3/5;
г) 4 11/30 - 2 9/20 - 1/10
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Answer 1

А) 2 13/30 - (1 1/10 + 1 1/5) = 2 13/30 - (1 3/30 + 1 6/30) = 2 13/30 - 2 9/30 = 4/30 = 2/15.
б) 2 8/15 - (1 3/10 + 2/5) = 2 16/30 - (1 9/30 + 12/30) = 2 16/30 - 1 21/30 = 76/30 - 51/30 = 25/30 = 5/6
в) 4 14/45 - 1 7/15 - 3/5 = 4 14/45 - 1 21/45 - 27/45 = 194/45 - 66/45 - 27/45 = 128/45 - 27/45 = 101/45 = 2 11/45.
г) 4 11/30 - 2 9/20 - 1/10 = 4 22/60 - 2 27/60 - 6/60 = 262/60 - 147/60 - 6/60 = 109/60 = 1 49/60.

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