Question

Calculati:
[1,10(2)-3$\frac{2}{15}$ ] -$(1 \frac{1}{4} +2 \frac{1}{8}- 3 \frac{1}{2} )$

Answer 1

Calculam separat fiecare fractie :
1,10(2)=(1102-110/900=992/900=248/225
3intregi si 2/15 =47/15
1intreg si 1/4=5/4
2 intregi si1/8=17/8
3intregi si1/2 =7/2
Calculam prima paranteza 248/225-47/15=248/225-705/225= - 457/225
Calculam a doua paranteza 5/4+17/8 - 7/2=10/8+17/8 - 28/8= - 1/8
Scadem cele doua paranteze -457/225 -(-1/8)=-457/225+1/8= - 3656/1800+225/1800=
 - 3431/1800