zad 1 wykonaj działania. 12 7/8 - 5 3/5 + 16,5 razy 7 = 5 7/9 razy 3 1/2 - 5,9 = 36,3 -9 1/3 razy 3 3/7 = 

12i7/8 - 5i3/5 + 16,5 * 7 = = 12i7/8 - 5i3/5 + 115,5 = = 12i7/8 - 5i3/5 + 115i1/2 = = 12i35/40 - 5i24/40 + 115i20/40 = = 127i55/40 - 5i24/40 = 122i31/40 5i7/9 * 3i1/2 - 5,9 = 52/9 * 7/2 - 5i9/10 = 364/18 - 5i9/10 =  20i4/18 - 5i9/10 = 20i20/90 - 5i81/90 = 19i110/90 - 5i81/90 = 14i29/90 36,3 - 9i1/3 * 3i3/7 =  36,3 - 28/3 * 24/7 = 36,3 - 4/1 * 8/1  = 36,3 - 32/1 = 36,3 - 32 = 4,3

12 7/8 - 5 3/5 + 16,5 * 7 = 12 35/40 - 5 24/40 + 115 1/2 = 7 11/40 + 115 20/40 = = 122 31/40 5 7/9 * 3 1/2 - 5,9 = 52/9 * 7/2 - 5,9=182/9 - 5,9 = 20 2/9 - 5 9/10 = = 20 20/90 - 5 81/90 = 19 110/90 - 5 81/90 = 14 29/90 36,3 - 9 1/3 *  3 3/7 = 36,3 - 28/3 * 24/7 = 36,3 - 4 * 8 = 36,3 - 32 = 4,3