1 4/9 * 1 5/13 - 2 1/12 * 4/15 = 1 4/9
1) 1 4/9 * 1 5/13 = 13/9 * 18/13 = 2
2) 2 1/12 * 4/15 = 25/12 * 4/15 = 5/9
3) 2 - 5/9 = 1 9/9 - 5/9 = 1 4/9
2 2/7 * 2 5/6 - 1 3/4 * 2 2/7 + 2 2/7 * 2/3 =
= 2 2/7 * (2 5/6 - 1 3/4 + 2/3) =
= 2 2/7 * (2 10/12 - 1 9/12 + 8/12) =
= 2 2/7 * (1 1/12 + 8/12) =
= 2 2/7 * 1 9/12 = 2 2/7 * 1 3/4 = 16/7 * 7/4 = 4
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Answers & Comments
1 4/9 * 1 5/13 - 2 1/12 * 4/15 = 1 4/9
1) 1 4/9 * 1 5/13 = 13/9 * 18/13 = 2
2) 2 1/12 * 4/15 = 25/12 * 4/15 = 5/9
3) 2 - 5/9 = 1 9/9 - 5/9 = 1 4/9
2 2/7 * 2 5/6 - 1 3/4 * 2 2/7 + 2 2/7 * 2/3 =
= 2 2/7 * (2 5/6 - 1 3/4 + 2/3) =
= 2 2/7 * (2 10/12 - 1 9/12 + 8/12) =
= 2 2/7 * (1 1/12 + 8/12) =
= 2 2/7 * 1 9/12 = 2 2/7 * 1 3/4 = 16/7 * 7/4 = 4