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8.1) positive sign
8.2) positive sign
8.3) negative sign
8.4) positive sign
9.1) 42
9.2) -23
10.1) 50
10.2) -38
Step-by-step explanation:
9.1) -30 + (-20) +92
= -30-20+92
= 92 - 50
= 42
9.2)49 +(-40)-32
= 49 -40-32
=49 - 72
= -23
10.1) -50+(-200)+300
= -50-200+300
= 300-250
= 50
10.2) 37+(-8)+(-2)+(-65)
= 37-8-2-65
= -38
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