Question

Oblicz , pamiętając o kolejności wykonywania działań .
a)(-2)x6+5x(-3)
b)6x(-2):12x(-2)
c)(-42):(-7)x6
d)-8x6+4x(-14)

Answer 1

A) (-2) x 6 + 5 x (-3) = 2 x 6 + 5 x 3 = 12 + 15 = 27
Bo dwa minusy dają plus !
b) 6 x (-2) : 12 x (-2) = 6 x 2 : 12 x 2 = 12 + 24 = 36
c) (-42) : (-7) x 6 = 42 : 7 x 6 = 6 x 6 = 36
d) (-8) x 6 + 4 x (-14) = 8 x 6 + 4 x 14 = 48 + 56 = 104
Licze na naj ;)

Answer 2

A) -12 + (-15) = -12 - 15 = -27
b) -12 : 12 x (-2) = -1 * (-2) = 2
c)(-42) :(-7) x 6 = 7*6 = 42
d) -48 + (-64) = -48-64 = -112