Pengurangan bilangan bulat

Penjelasan dengan langkah-langkah:

• 1. 13 + (-21) – (-19) =

= -8 – (-19)

= 8 – 19

= 11 ✔️.

• 2. (-9) + (-15) – 19 -(-20) =

= -24 – 19 – (-20)

= -43 – (-20)

= (–23) ✔️.