Question

va rog,ajutati ma cu ex 10 punctele incercuite ,doar!!!
doar punctele c si e

b615d752396de5c43000bb95e60c28d4.pdf

Answer 1

c)(1 7/9-1 1/2)-(15/16-1/24)=
=16/9-3/2-15/16+1/24=
=(16*16-3*72-15*9+6)/144=
=(256-216-135+6)/144=
=-89/144=-0,6180(5)

e)(13/63+17/45)-(5/36-1/27)=
=13/63+17/45-5/36+1/27=
=(13*60+17*84-5*105+140)/3780=
=(780+1428-525+140)/3780=
=1823/3780=0,48(227513)