1.25+(_10) 2._20+303._7+104.9+(_4) 5._18+4​

25 + (-10)

= 25 – 10

= 15

-20 + 30

= 10

-7 + 10

= 3

9 + (-4)

= 9 – 4

= 5

-18 + 4

= -14