Hitunglah:1.42+(-35)-12=2.(-50)-(-25)+45=3.3+(-7)-4=

Jawaban:

1. 42+(-35)-12=

7-12=

-5

2. (-50)-(-25)+45=

(-50)+25+45=

(-25)+45=

10

3. 3+(-7)-4=

(-4)-4=

-8