-4 2/7 : 1 19/21 = -30/7 : 40/21 = -30/7 * 21/40 = -30/7 * 21/40 = -3/7 * 21/4 = -63/28 = -9/4 = -2 1/4
Відповідь: Б. -2 1/4
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-4 2/7 : 1 19/21 = -30/7 : 40/21 = -30/7 * 21/40 = -30/7 * 21/40 = -3/7 * 21/4 = -63/28 = -9/4 = -2 1/4
Відповідь: Б. -2 1/4