1) 5 целых 3_4 * 3 целых 5_7+3 целых 5_7*1 целую 1_4 = ... (2) 8 целых 3_5*6 целых 1_7-1 целая 1_7 * 8 целых 3_5 = ... (3) 15 целых 3_8*4 целых 1_6-4 целых 1_6*15 целых 3_8 = ... (4) 10 целых 5_11*4 целых 1_3+10 целых 5_11 * 6 целых 2_3 = ... (5) (6 целых + 1 целая 1_3*2 целых) * 30 целых

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  1. 9 июля, 21:11
    0
    1) 5 3/4 * 3 5/7 + 3 5/7 * 1 1/4 = 26/7 * (23/4 + 5/4) = 26/7 * 28/4 = (26 * 28) / (7 * 4) = 728/28 = 26.

    5 3/4 = (5 * 4 + 3) / 4 = 23/4.

    3 5/7 = (3 * 7 + 5) / 7 = 26/7.

    1 1/4 = (1 * 4 + 1) / 4 = 5/4.

    2) 8 3/5 * 6 1/7 - 1 1/7 * 8 3/5 = 43/5 * (43/7 - 8/7) = 43/5 * 35/7 = (43 * 35) / (5 * 7) = 1505/35 = 43.

    8 3/5 = (8 * 5 + 3) / 5 = 43/5.

    6 1/7 = (6 * 7 + 1) / 7 = 43/7.

    1 1/7 = (1 * 7 + 1) / 7 = 8/7.

    3) 15 3/8 * 4 1/6 - 4 1/6 * 15 3/8 = 123/8 * (25/6 - 25/6) = 123/8 * 0 = 0.

    15 3/8 = (15 * 8 + 3) / 8 = 123/8.

    4 1/6 = (4 * 6 + 1) / 6 = 25/6.

    4) 10 5/11 * 4 1/3 + 10 5/11 * 6 2/3 = 115/11 * (13/3 + 20/3) = 115/11 * 11 = 1265/11 = 115.

    10 5/11 = (10 * 11 + 5) / 11 = 115/11.

    4 1/3 = (4 * 3 + 1) / 3 = 13/3.

    6 2/3 = (6 * 3 + 2) / 3 = 20/3.

    5) (6 + 1 1/3 * 2) * 30 =

    1 1/3 = (1 * 3 + 1) / 3 = 4/3.

    6 = 5 3/3 = (5 * 3 + 3) / 3 = 18/3.

    1. 4/3 * 2 = (4 * 2) / 3 = 8/3.

    2. 18/3 + 8/3 = 26/3.

    3. 26/3 * 30 = (26 * 30) / 3 = 780/3 = 260.
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