Ответ:

а) 6-2 10/13 = 5 13/13 - 2 10/13 = 3 3/13 б) 7 3/8 + 1,7/10 = 7 30/80 + 1 56/80 = 8 86/80 = 8 6/80 = 8 3/40 Б) 7 11/12 +5 13/18 = 7 33/36 + 5 26/36-12 59/36-13 23/36 ж) '9 2/9 - 6 5/ 6 = 9 12/54 - 6 45/54 = 8 66/54 - 6 45/54 = 2 21/54 = 2 7/18

Пошаговое объяснение:

[tex] 1)\frac{42}{13} \\2) 9 \times \frac{3}{40} \\ 3)10 \times \frac{23}{36} \\ 4) \frac{43}{18} [/tex]