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標題:
About some P.6 Maths....please列明Step...
發問:
1) -3-{-3-[-3-(-3)]}=? 2) A submarine moved up 50 m from 100m below the sea level,then it descened by 80 m.Use a directed number to represent the location of the submarine.
最佳解答:
-3-{-3-[-3-(-3)]} = -3-[-3-(-3+3)] =-3-(-3) =0 2) -100+50-80 = -130m p.s. 呢d係中一課程既第一課: direct number來架喎 宜家搬左去p6?
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其他解答:
-3-{-3-[-3-(-3)]} =-3-{-3-0} =-3-(-3) =0 -100+50-80 =-50-80 =-130 ----|----|----|----|----|----|----|----|----|----|----|--> _ -5_ -4_ -3_ -2_-1_ 0_ 1_ 2_ 3_ 4_ 5 土x+(+y)=由土x向右移y格 土x+(-y)=由土x向左移y格 土x-(+y)=由土x向左移y格 土x-(-y)=由土x向右移y格
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