608.8..... ...............
45 км = 45000 м = 4500000 см
4500000*1/100000=45
Ответ: 45 см
1) 13х3= 39
2) (13+39)х2=104
3) 13х39=507
<span>a)1 1/2-2/3 = 9\6 - 4\6 = 5\6
в) 1 1/8-1/4 = 9\8 - 2\8 = 7\8
д) 2 3/10-4/15 = 345\150 - 40\150 = 305\150 = 2 5\150 = 2 1\30
б) 1 1/4-1/3 = 15\12 - 4\12 = 11 \ 12
г) 1 2/3-5/6 = 10\6 - 5\6 = 5\6
е) 3 1/4-5/6 = 78\24 - 20\24 = 58\24 = 2 10\24 = 2 5\12</span>