Răspuns :

Răspuns:

b) (1x2+3)-4=

=(2+3)-4=

=5-4=

=1

c){[(1+2):3]+4}:5=

=[(3:3)+4]:5=

=(1+4):5=

=5:5=

=1

d){[(1x2+3)-4]+5}:6=

=[(5-4)+5]:6=

=(1+5):6=

=6:6=

=1

e) (1+2-3+4):(5+6-7)=

=4:4=

=1

f){[(1+2+3+4)x5]+6}:7:8=

=[(10x5)+6]:7:8=

=(50+6):7:8=

=56:7:8=

=8:8=

=1

g)[(1+2x3x4+5)+6x7]:8:9=

=[(1+24+5)+42]:8:9=

=(30+42):8:9=

=72:8:9=

=9:9=

=1

Explicație pas cu pas: