Пошаговое объяснение:
1) (2 3/4 + 3 7/17) - 1 3/4 = 6 11/68 - 1 3/4 = 4 7/17 = 4,4
2) 21 5/8 + ( 15 5/21 + 17 3/8) = 21 5/8 + 32 103/168 = 54 5/21 = 54,2
3) ( 13 7/8 + 2 5/11) - ( 2 5/8 + 1 5/11) = 16 29/88 - 4 7/88 = 12 1/4 = 12,25
4) 28 13/15 + (21 3/37 - 11 13/15) = 28 13/15 + 9 119/555 = 38 3/37 = 38,08
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Пошаговое объяснение:
1) (2 3/4 + 3 7/17) - 1 3/4 = 6 11/68 - 1 3/4 = 4 7/17 = 4,4
2) 21 5/8 + ( 15 5/21 + 17 3/8) = 21 5/8 + 32 103/168 = 54 5/21 = 54,2
3) ( 13 7/8 + 2 5/11) - ( 2 5/8 + 1 5/11) = 16 29/88 - 4 7/88 = 12 1/4 = 12,25
4) 28 13/15 + (21 3/37 - 11 13/15) = 28 13/15 + 9 119/555 = 38 3/37 = 38,08