Question

Calculati: (Ex.4,5). Multumesc

Answer 1

Răspuns:

4. a) -2/2+(-3/2)+-5/2

b)8/4+(-1/4)=7/4

c)1/3+(-9/3)=-8/3

d)-4/2+(-5/2)=-9/2

e) 8/8+(-7/8)=1/8

f)12/4+(+3/4)=15/4

5. a) 1,3

b) - 12,62

c)1,2

d)3,8(3)=(383-38)/90 = 345/90

3,(6)=(36-3)/9=33/9

-345/90+(-33/9)=

-345/90+(-330/90)=

-675/90=-135/18=-15/2

Explicație pas cu pas:

e) 1,(3)=(13-1)/9=12/9=4/3

3,24=324/100=81/25

81/25+(-4/3)=243/75+(-100/75)=143/75

f) 2,1(6)=(216-21)/90=195/90=39/18=13/6

1,06=106/100=53/50

-13/6+53/50=-325/150+159/150= - 166/150= - 83/75