Question

Calculează: 1/12×3/4+16/25×1/15×33/4×28/55
b) 1/12×1/5+1/12×7/10+1/12×1/15

Answer 1

Răspuns:

Explicație pas cu pas:

a)

1/16+(16·7)/625=

1/16+112/625=

(625+672)/10000=

1297/10000=

0,1297

b)

dam faactor pe 1/12

1/12(1/5+7/10/-1/15)=

aducem la acelasi numitor 30

(1/12)·[(6+21+2)/30]=

(1/12)·(29/30)=

29/360