a)
-3 · 10 - (-7) = -30 + 7 = -(30 - 7) = -23
b)
42 : (19 - 25) = 42 : (-(25 - 19)) = 42 : (-6) = -7
c)
7 + (-7) + (-3)² = 7 - 7 + 9 = 0 + 9 = 9
d)
(-4) · (-8) - 22 : (-2) = 32 + 11 = 43
Odpowiedź:
a) ...=(-30)+7=(-23)
b)...=42:(-6)=(-7)
c) ...=7-7+9=9
d) ...=32+11=43
Szczegółowe wyjaśnienie:
myślę, że ok
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a)
-3 · 10 - (-7) = -30 + 7 = -(30 - 7) = -23
b)
42 : (19 - 25) = 42 : (-(25 - 19)) = 42 : (-6) = -7
c)
7 + (-7) + (-3)² = 7 - 7 + 9 = 0 + 9 = 9
d)
(-4) · (-8) - 22 : (-2) = 32 + 11 = 43
Odpowiedź:
a) ...=(-30)+7=(-23)
b)...=42:(-6)=(-7)
c) ...=7-7+9=9
d) ...=32+11=43
Szczegółowe wyjaśnienie:
myślę, że ok