plis na jutro a) 18x23+(-17)x23 b) 21x(-4)-(-5)x21 c) 13x(-15)=(-15) x (-12) d) 16:(-2)-4:(-2) e) 9:(-3)-(-15):(-3) f)-18 : (-3)+(21):3 plissssss szybko
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a) 18x23+(-17)x23 = 23 x (18 + (-17)) = 23 x 1 = 23
b) 21x(-4)-(-5)x21= 21 x (-4 - (-5)) = 21 x (-4 + 5) = 21 x 1 = 21
c) 13x(-15) + (-15) x (-12) = (-15) x (13 + (-12)) = (-15) x 1 = - 15
d) 16:(-2)-4:(-2)= - 8 - (-2) = - 8 + 2 = - 6
e) 9:(-3)-(-15):(-3) = - 3 - 5 = - 3 + (-5) = - 8
f)-18 : (-3)+(21):3 = 6 + 7 = 13 lub -18 : (-3) + (-21) : 3 = 6 + (-7) = - 1
a) 18x23+(-17)x23 = 414 - 391 = 23
b) 21x(-4) - (-5)x21 = -84 + 105 = 21
c) 13x(-15) - (-15) x (-12) = -195 - 180 = -375
d) 16:(-2)-4:(-2) = -8 + 2 = -6
e) 9:(-3)-(-15):(-3) = -3 - 5 = -8
f)-18 : (-3)+(21):3 6 + 7 = 13