Question

Вычислите:5/9+23
112+34
12+38
171000+81100
1116-38
56-512
47-821
1730-415 
(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