Explicación paso a paso:
1. 7 4 7 • 4 28
--- • ----- = ----------- = ---------
12 14 12 • 14 168
3 6 3 • 6 18
----- • ----- = ----------- = ---------
5 9 5 • 9 45
28 18 420 + 1008 1428
------ + ------ = --------------------- = ----------
168 45 2520 2520
2.- (5/6 • 8/12) • (12/15 • 16/20) =
40/ 72 • 192/300 =
7680/57600 resultado
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Explicación paso a paso:
1. 7 4 7 • 4 28
--- • ----- = ----------- = ---------
12 14 12 • 14 168
3 6 3 • 6 18
----- • ----- = ----------- = ---------
5 9 5 • 9 45
28 18 420 + 1008 1428
------ + ------ = --------------------- = ----------
168 45 2520 2520
2.- (5/6 • 8/12) • (12/15 • 16/20) =
40/ 72 • 192/300 =
7680/57600 resultado