7(4 - 2) = 7 · 2 = 14
- 6(2 + 1) = - 6 · 3 = - 18
(4 + 2 - 1) = (6 - 1) = 5
2(6 - 3) + 4( + 1) = 2 · 3 + 4 · 1 = 6 + 4 = 10
8( − 1) − 2(2 − 3) = - 8 - 2 · (- 1) = - 8 + 2 = - 6
−3(2,5 − ) + 2(1,5 − ) = - 7,5 + 3 = - 4,5
(6 + )(2 + 1) = 6 · 3 = 18
(3 − 7)( − 2) = - 4 · (- 2) = 8
( − )(3 + 5) = - 8