Пошаговое объяснение:
1) |-4,2| + |-6,8| - |3,45| = 4,2 + 6,8 - 3,45 = 7,55
2) |-4/13| : |8/39| = 4/13 : 8/39 = 4/13 * 39/8 =
1/1 * 3/2 = 3/2 = 1 1/2
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Пошаговое объяснение:
1) |-4,2| + |-6,8| - |3,45| = 4,2 + 6,8 - 3,45 = 7,55
2) |-4/13| : |8/39| = 4/13 : 8/39 = 4/13 * 39/8 =
1/1 * 3/2 = 3/2 = 1 1/2