1. Quyidagilarni hisoblang: a) 5 + 1; b) (−5) + (−5); d) (−2) + (−3); e) (−3) + (−5).

a) Ikkala son ham musbat: 5 + 1 = 6.

b) Ikkala manfiy sonni qo‘shamiz: (−5) + (−5) = −(5 + 5) = −10.

d) Ikkala manfiy sonni qo‘shamiz: (−2) + (−3) = −(2 + 3) = −5.

e) Ikkala manfiy sonni qo‘shamiz: (−3) + (−5) = −(3 + 5) = −8.

Javob: a) 6; b) −10; d) −5; e) −8.