(-7)-(+5)+(-4)-(-10)
=-7-5-4+10
=-12-4+10
=-16+10
=-6
-2.4+3.5-4.6+3.5
=1.1-4.6+3.5
=-3.5+3.5
=0
四分之三-二分之七+(-六分之一)-(-三分之二)-1
=12分之9-12分之42-12分之2+12分之8-1
=-12分之33-12分之2+12分之8-1
=-12分之35+12分之8-1
=-12分之27-1
=-12分之39
=-4分之13
(-8)+10+2+(-1)
=-8+10+2-1
=2+2-1
=4-1
=3