Question

exercitile 7 si 8 va rog​

Answer 1

Explicație pas cu pas:

7.

a(²7/9+³17/6)-(³5/6-¹1/18) amplificam frunțile pentru a avea numitori comuni.

(14/18+51/18)-(15/18-1/18)

65/18+14/18

79/18

b(³17/24+²5/36)-(³5/60-¹⁰1/18) amplificam frunțile pentru a avea numitori comuni.

(51+72+10/72)-(15/180-10/180)

⁵61/72-²5/180

305/360-10/360

295/360

c)4;7/9-1;1/2)-(³15/16-²1/24) introducem intregii in fracție

( 4×9+7/9-1×2+1)-( 45/48-2/48)

(²43/9-⁹3/2)-43/48

(86/18-27/18)-43/48

⁸59/18-³43/48

472/144- 126/144

346/144

d)(¹⁰7/9+⁹7/10 -⁵1/18)-(³13/24-⁴1/18)

(70/90+63/90-5/90)-(39/72-4/72)

(133/90-5/90)-35/72

128/90-35/72

93/72

e)(⁵13/63+⁷17/45)-(³5/36-⁴1/27)

(65/315+119/315)-(15/108-4/108)

¹⁰⁸ 184/315-³¹⁵11/108

19872/34020-3465/34020

16407/34020