Вычислите: 6 9/20 -2 7/24+ 3 3/10- 1 1/5
5/9:3/5 + 7 6/7 : 9 3/7 -2 5/8 * 4/21
(7 1/5 * 2 1/8 + 1 1/2 *6) + (7 1/5 * 1 5/8 +3 7/8 *4/5) + (2/3 *6-1 5/8 *4/5)
6 3/7 : 1 2/7 *3 1/3
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1* 4/21: 5 1/4