(+6)-(﹣8)+(-14) -3.7+8.4-4.3-3又5分之2 0-(+16)+(-4.2)-(-9)
=(6+8-14)-(3.7+4.3)+8.4-7-16-4.2+9
=-8+8.4-23-4.2+9
=-22+4.2
=-17.8
(-6.54)+5.86+(-12.4)-(-3.66)
=-(6.54+12.4)+5.86+3.66
=-18.94+9.52
=-9.42
156.32-298.53-45.5+83.01
=156.32+83.01-(298.53+45.5)
=239.33-344.03
=-104.7