Mohon dikerjakan,dengan caranya / gambar besok dikumpulkan ​

Nomor 1

8 – 16

= – (16 – 8)

= –8

Nomor 2

-12 – 9

= – (12 + 9)

= – (21)

= –21

Nomor 3

-5 – (-1)

= -5 + 1

= – (5 – 1)

= –4

Nomor 4

-13 – (-20)

= -13 + 20

= (20 – 13)

= 7