(11/14-10/21) * 42/13

Question

(11/14-10/21) * 42/13

Answer 1

11\14 - 10\21 = 33\42-20\42 = 13\42
13\42*42\13 = 1

Answer 2

1.231/294-140/294=91/294(делим на 7 и чисельник, и знаменник)=13/42
2.13/42*42/13=1
Ответ 1