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Iulianaantofie59
a fost răspuns

6. calculeaza
a)0,5-1/2×(3/4-0,25)
b) nu trebuie
c)(1/3+0,25)(1+5/7)
d)2/5×(0,5+0,5×1/3)
VA ROGG DAU COROANAA​

Răspuns :

Dianageorgiana794

Răspuns:

a)0,5-1/2×(3/4-0,25)=

0,5-0,5×(0,75-0,25)=

0,5-0,5×0,5=

0,5-0,25=

0,25

c)(1/3+0,25)×(1+5/7)=

(1/3+25/100)×(1+5/7)=

(⁴⁾1/3+³⁾1/4)×(⁷⁾1+5/7)=

7/12×12/7=

1

d)2/5×(0,5+0,5×1/3)=

2/5×(5/10+5/10×1/3)=

2/5×(³⁾1/2+1/6)=

2/5×4/6=

4/15