Question

Efectuați: a) 3-(-6-8+5+1):(+3-9-2+4); c)-2-(-8+7-6-5):( -3+9-1-4); b)-1 (+3-9-4+8):( −5+4–2+4); d) (+3-7-9+5):( -6-2+5+1): 2; f) 1 + (-6+8-5-1):(-2+3+4-6); h) (-5-4+3+6):( -7+2-8+4); e) - (+8-2-5-9):( -7-2+4+1); g) -3 + (-8-3+2+7):( +9–6–8+4); i) 5 (-2+8-9+1):( -5-4+7+1); j) 3+ (+3-8-2+4):( −1−6+3+5). - DAU 5 STELE SI COROANA ​

Answer 1

Explicație pas cu pas:

a) 3-(-6-8+5+1):(+3-9-2+4)

= 3 - (-10):(-4)

= 3 - 2.5

= 0.5

b) -1 (+3-9-4+8):( −5+4–2+4)

= -1 * (-2):1

= -1 * -2

= 2

c) -2-(-8+7-6-5):( -3+9-1-4)

= -2 - (-12):(1)

= -2 - (-12)

= 10

d) (+3-7-9+5):( -6-2+5+1): 2

= (-8):(-2):2

= 4:2

= 2

e) - (+8-2-5-9):( -7-2+4+1)

= - (-8 - 2 - 5 - 9):(-4)

= 24:-4

= -6

f) 1 + (-6+8-5-1):(-2+3+4-6)

= 1 + (-4):(-1)

= 1 - 4

= -3

g) -3 + (-8-3+2+7):( +9–6–8+4)

= -3 + (-2):(-1)

= -3 - (-2)

= -1

h) (-5-4+3+6):( -7+2-8+4)

= 0:(-9)

= 0

i) 5 (-2+8-9+1):( -5-4+7+1)

= 5 * (-2):-1

= -10:-1

= 10

j) 3+ (+3-8-2+4):( −1−6+3+5)

= 3 - (3 - 8 - 2 + 4):( -9)

= 3 - (-3):-9 = 3 + 1/3

= 10/3