Matematyka

Autorzy:Krystyna Zarzycka, Piotr Zarzycki

Wydawnictwo:GWO

Rok wydania:2014

Oblicz. 4.56 gwiazdek na podstawie 9 opinii
  1. Szkoła podstawowa
  2. 6 Klasa
  3. Matematyka

a) 

`2 + (-6) = 2 - 6 = -4`

`-21 + 17 = -(21 - 17) = -4`

`-3 + (-8) = -3 -8 = -11`

`7 + (-6) + 12 = 7 - 6 + 12 = 1 + 12 = 13`

`15 + (-2) + (-11) = 15 - 2 - 11 = 13 - 11 = 2`

`-8 + (-6) + (-3) = -8 -6 -3 = -17`

b) 

`8 - 12 = -(12 - 8) = -4`

`-14 - 6 = -(14+6) = -20`

`-24 - 47 = -(24 + 47) = -71`

`7 - (-8) = 7 + 8 = 15`

`-15 - (-6) = -15 + 6 = -(15-6) = -9`

`-23 -(-8) = -23 + 8 = -(23 - 8) = -15`

c)

`6 + (-8) -4 = 6 - 8 - 4 = -(4 + 8 - 6) = -(12 - 6) = -6`

`15 + (-7) -(-2) = 15 - 7 + 2 = 8 + 2 = 10`

`5 - 12 - (-27) = -(12 - 5) + 27 = -7 + 27 = 27 - 7 = 20`

`-5 - (-13) + (-11) = -5 + 13 - 11 = 13 - 5 - 11 = 8 - 11 = -(11 - 8) = -3`

`-12 - 23 -41 = -(12 + 23 + 41) = -(35 + 41) = -76`

`-14 - 6 + (-18) = -14 - 6 - 18 = -(14 + 6 + 18) = -(20 + 18) = -38`

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