ex 2) 10%= 10 supra 100 = 1 supra 10. Fractie ireductibila: 1 supra 10
75%= 75 supra 100= 3 supra 4. Fractie ireductibila: 3 supra 4
ex 3)-|----|----|----|----|----|----|---------|---------|----------------------->ordine numerilor care le pui pe segment; -7;-6;-6;-4;-3;-2;-1;0.u=3 |---| (cm)
-7 -5 -3 -1 O
--------------|----|----|----|----|----|----|--------|---------|----------------------->
-6 -4 -2
5/6= 0,8(3)
5/6= Fractia se afla intre segmentul 5 si 6, pune-l mai aproape de 6.
ex4) Prima zi=a
A doua zi=b
a+b=180km
a=3 supra 5×180=540 supra 5=108km
b=180-a=180-108=72km.
ex 5) a = 28/9 + 80/90 - 28/36 - 10/45
(factorul comun e 180)
a = (560 + 160 - 140 - 40)/180
a = 540/180
a = 3................. sper cas corecte.............................
