Răspuns:
5x (6+13+3)=5 x 22=110
5x (6+13+3)=5x6+5x13+5x3=
=30+65+15=
=110
3 x (19-13) = 3 x 6 =18
3 x (19-13) = 3 x 19 - 3 x 13=
= 57 - 39=
=18
Explicație pas cu pas:
5×(6+13+3)=5×22=110
5×(6+13+3)=5×6+5×13+5×3
=30+65+15
3×(19-13)=3×6=18
3×(19-13)=3×19-3×13
=57-39
