Вычислите, применяя законы сложения и умножения.
7/25 + 32/33 - 7/25 =
4/35 *17/18 +17/18 *31/35 =
72/73 * 34/65 + 72/73 * 39/65=
7/25 + 32/33 - 7/25 =
4/35 *17/18 +17/18 *31/35 =
72/73 * 34/65 + 72/73 * 39/65=
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= 17/18 * (4/35+31/35) = 17/18 * 35/35 = 17/18 * 1 = 17/18
= 72/73 * (34/65 + 39/65) = 72/73 * 73/65 (73 сокращаем на 73) = 72/65 = 1 7/65