11﹣(﹣4)= 11﹣(﹢7)=﹢21﹣(﹢11)=
﹣1﹣2﹣3= ﹣14﹣(﹣14)=﹣15﹣5=
﹣5﹣14﹢(﹣2)=﹣8﹣7= ﹣16﹣14=
17﹣7﹣(﹣3) = 19﹣8﹢(﹣7) = 22﹣(﹢22)=
﹣11﹢(﹣2)×3=﹣2×4= ﹣4×4﹣(﹣7)=
﹣5﹣(﹣2)×3=﹣6﹢(﹣9)×2=
(1)(+26)+(-18)+(﹣5)﹣(-26)(2)(-1.75)+(+1.5)+(+7.3)+(-2.25)+(-8.5)
(3)(4)(-1.5)+(+0.7)+(-0.6)+(+1.3)+(-0.5)
(5)(6)
(1)(2)
(3)
(4)8-(8-21)(5)(3-5)-(5-3)(6)(-62)-(-22)-(-78)-(+32).