Question

Va rog imi trebuie până la 13:30 Nu e asa greu

Answer 1

1)

a)

1 2/3+11/15=

(1×3+2)/3+11/15=

5/3+11/15=

25/15+11/15=

36/15=

12/5

b)

2 1/4+(-5/6)=

(2×4+1)/4- 5/6=

9/4-5/6=

27/12- 10/12=

17/12

c)

(-3/8)+(-1 2/5)=

(-3/8)+(- 1×5+2)/5=

-3/8- 7/5=

-15/40-56/40=

-71/40

2)

a)

1,25+0,(54)=

125/100+ 54/99=

5/4+ 6/11=

55/44+24/44=

79/44

b)

0,12+[-2,(3)]=

12/100+ [-(23-2)/9]=

3/25+(-21/9)=

3/25-7/3=

9/75- 175/75=

-166/75

c)

(-1,5)+ [-1,2(7)]=

(-15/10)+[-(127-12)/90]=

(-3/2)+(-115/90)=

-3/2-23/18=

-27/18-23/18=

-50/18=

-25/9