Вычислите:5/9+2\31\12+3\41\2+3\817\1000+81\10011\16-3\85\6-5\124\7-8\2117\30-4\15...

Question

Вычислите:5/9+2\3
1\12+3\4
1\2+3\8
17\1000+81\100
11\16-3\8
5\6-5\12
4\7-8\21
17\30-4\15
\(означает дробную черту)

Answer 1

1. 11/9
2. 5/6
3. 7/8
4. 827/1000
5. 5/16
6. 5/12
7. 4/21
8. 3/10

Answer 2

(5/9)+(2/3)=(5+2*3)/9=11/9=1(2/9)
(1/12)+(3/4)=(1+3*3)/12=10/12=5/6
(17/1000)+(81/100)=(17+81*10)/1000=827/1000=0,827
(11/16)-(3/8)=(11-3*2)/16=5/16
(5/6)-(5/12)=(5*2-5)/12=5/12
(4/7)-(8/21)=(4*3-8)/21=4/21
(17/30)-(4/15)=(17-4*2)/30=9/30=3/10=0,3