2) 5 х 1/7 + 5 х 6/7 = 5/35 + 30/35 = 35/35 = 1 (одна целая)
4) 5/8 х 5/6 - 1/4 х 5/6 = 25/48 - 1/4 = 24/44 х 5/6 = 120/264
6) 1/7 х 1/8 + 1/7 х 1/6 = 1/7 х 1/8 = 1/56 + 1/7 = 2/63 х 1/6 = 2/378
5т794кг+781ц*26=5794кг+7810кг*26=13604кг*26=353704кг=353т7ц4кг
2км308м*407-6км864м=2308м*407-6864м=939356м-6864м=932492м=932км492м
6 : 2 = 3
8 : 2 = 4
18 : 3 = 6
9 : 3 = 3
21 : 3 = 7
64 : 8 = 8
24 : 8 = 3
32 : 8 = 4