Obliczcie ale nie z kalkulatora tylko np jak jest to działanie :
(-12) + (-8) - ( +7) - (-9)= -12 - 8 - 7 +9 = -27+9= 18
a zadanie 3 jest takie :
1. [(-16) - (-4)] - (-8 + 6)
2. [-(+11) - (-6)] + (-5 +8)
3.(-19) - [-(-18) - (+7)] + (-34)
4.-(+27)-(-26 - 17) + (+14)
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1. [(-16) - (-4)] - (-8 + 6) = (-16+4)+8-6 = -12+8-6 = -18+8 = -10
2. [-(+11) - (-6)] + (-5 +8) = (-11+6)-5+8 = -5-5+8 = -10+8 = -2
3.(-19) - [-(-18) - (+7)] + (-34) = -19-(18-7)-34 = -19-18+7-34 = -37+7-34 = -30-34 = -64
4.-(+27)-(-26 - 17) + (+14) = -27-(-43)+14 = -27+43+14 = 16+14 = 30