Question

(pamietajac o kolejnosci wykonywania dzialan) oblicz:

a) 27-7x[(32:8-3)x2]+=

b) [(-6)+(25:5x3-7)]:3=

Answer 1

a) 27-7*[(32/8-3)*2]+3^2=

=27-7*[(4-3)*2]+9=

=27-7*(1*2)+9=

=27-7*2+9=

=27-14+9=

=22

 

b) [(6^2-6)+(25/5*3-7)]/3=

=[(36-6)+(25/15-7)]/3=

=[30+(5/3-7)]/3=

=[30+(5/3-7/1)]/3=

=[30+(5/3+21/3)]/3=

=(30+26/3)/3=

=(30/1+26/3)/3=

=(90/3+26/3)/3=

=(116/3)/3=

=116/3*1/3=

=116/9=

=12 8/9