Question

Calculeaza
a) 0,2+0,5-1/3
c)0,25-1/7+0,2
d)0,5+1,4×(2/3+1/6)​

Answer 1

Răspuns:

Explicație pas cu pas:

0,2=   2/10   SIMPLIFIC   =1/5

0,5=5/10    SIMPLIF=1/2

1/5+1/2-1/3=ADUCEM  LA   ACELASI    NUMITOR  ADICA  30  

6/30+15/30-10/30=21/30-10/30=11/30

0,25=25 /100  simpl   cu   25=1/4

1/7=17/10

0,2=2/10simplif cu2=1/5

1/4-1/7+1/5=cauti  numitorul   comun   si   amplifici

0,5=1/2

1,4=7/5

1/2+7/5x(4/6+1/6)=1/2+7/5x5/6

1/2+7/6=amplificam   cu3   =3/6+7/6=10/6  simplific  cu2=5/3