Question

Transformati in fractii si apoi calculati :
a) 2,(3) + 1,2
b) 0,0(3) + 2,5(3)
c) 2,12(9) - 2,13
d) (3,27 + 0,73) × 0,31

va rog mult dau coroana si ce vreti voi ​​

Answer 1

Explicație pas cu pas:

a)2,(3)+1,2

=2/9+12/10

=2/9+6/5

=10+54/45

=64/45

b)0,0(3)+2,5(3)

=3/90+238/90

=241/90

2,5(3)=253-15/90=238/90

c)2,12(9)-2,13

=2008/900-213/100

=2008+1917/900

=3925/900(nu stiu daca se simplifica)

2,12(9)=2129-121/900=2008/90

d)(3,27+0,73)×0,31

=(327/100+73/100)×31/100

=400/100×31/100

=12400/100

=124(tai 2 de zero de la 12400 si 100)