Question

Exercitiul 1 subpunctul b va rog.

Answer 1

(-0,5)⁻²=(5/10)⁻²=(10/5)²=2²=4
0,0(6)=6/90=simplif.cu 3=2/30=simplificam cu 2=1/15
0,04=4/100=simplificam cu 4=1/25
2⁻³=1/2³=1/8
(0,2)⁻²=(2/10)⁻²=(10/2)²=5²=25
ex.devine
{[4-25·(1/15-1/25+7/30)]:1/8}:25=
{[4-25·(1·10-1·6+7·5)/150]·8}:25=
{[4-25·39/150]·8}:25=
{[4-39/6]·8}·1/25=
{[(4·6-39)/6]·8}·1/25=
(-15/6)·8·(1/25)=simplificam ce se poate=-4/5