Чему равен результат вычисления выражения 4 sin П/4 cos П/2 - 1/2 tg П/6 ?

4 2/3 * 6 - 2 23/42 * 3 1/13 + 2 1/8 * 1 29/51 = 23 45/91

1) 4 2/3 * 6 = 14/3 * 6 = 28

2) 2 23/42 * 3 1/13 = 107/42 * 40/13 = 2140/273 = 7 229/273

3) 2 1/8 * 1 29/51 = 17/8 * 80/51 = 10/3 = 3 1/3

4) 28 - 7 229/273 = 27 273/273 - 7 229/273 = 20 44/273

5) 20 44/273 + 3 1/3 = 20 44/273 + 3 91/273 = 23 135/273 = 23 45/91

(5 3/10 - 3 4/5 * 13/38) * 5/84 + 2 1/12 * 4/15 = 50/63

1) 3 4/5 * 13/38 = 19/5 * 13/38 = 13/10 = 1 3/10

2) 5 3/10 - 1 3/10 = 4 

3) 4 * 5/84 = 20/84 = 5/21

4) 2 1/12 * 4/15 = 25/12 * 4/15 = 5/9

5) 5/21 + 5/9 = 15/63 + 35/63 = 50/63  

57623387*10=576233870

576233878*100=5762338700

57623387*1000=57623387000

920657*10= 9206570

920657*100= 92065700

920657*1000= 920657000

6834*10=68340

6834*100=683400

6834*1000=6834000

74081*10= 740810

74081*100= 7408100

74081*1000= 74081000

8953005*10=89530050

8953005*100=895300500

8953005*1000=8953005000