Question

va rog frumos,aceste ex sa le rezolvati,dau coroana ​

Answer 1

Explicație pas cu pas:

1. (5+203):2+[230-(76+9)]

=208:2+(230-85)

=208:2+145

=104+145

=942

2. [(51+43):2]×31+17-(125+7)

=(49:2)×31+17-132

=24.5×31+17-132

=759.5+17-132

=644.5

3. 170:10+729:9-[25×(39-38)]

17+81-(25×1)

17+81-25

98-25

78

4.31+32×450-(39×6:2)+8

=31+32×450-117+8

=31+13400-177+8

=13431-144+8

=13,295

5.(31-21):10+(10+40)

=10:10+(10+40)

=1+50

=51