Question

socorroooooooooo alguem me ajudaaaaa!!! urgente​

Answer 1

Resposta:

a) 11/10, b) 7/12, c) 13/5, d) -11/6, e) -9/20, f) 1/30, g) -37/15, h) -4,3 i) -63,05

Explicação passo-a-passo:

a) (+3/5) + (+1/2) = 6 + (+5)/10 = (6+5)/10 = 11/10

mmc

5, 2| 2

5,1 | 5

1, 1 2×5=10

b) (-2/3) + (+5/4) = -8 + (+15)/12 = (-8 +15)/12 = 7/12

mmc

3, 4 | 2

3, 2 | 2

3, 1 | 3 2×2×3=12

1, 1

c) (-2/5) + (+3) = -2 + (+15)/5 = (-2+15)/5 = 13/5

mmc

5, 1| 5

1, 1 5×1=5

d) (-1) + (-5/6) = -6 + (-5)/6 = (-6-5)/6 = -11/6

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1, 6| 2

1, 3 | 3

1, 1 2×3=6

e) (-0,2) + (-1/4) = (-2/10) + (-1/4) = -4 + (-5)/20 = (-4 -5)/20 = -9/20

mmc

10, 4| 2

5, 2 | 2

5, 1 | 5

1, 1 2×2×5=20

f) (+0,7) + (-2/3) = (7/10) + (-2/3) = +21 + (-20)/30 = (+21 - 20)/30 = 1/30

mmc

10, 3| 2

5, 3 | 3

5, 1 | 5

1, 1 2×3×5=30

g) (-2⅕) + (-2/3) = (-2 + 1/5) + (-2/3) = (-10+1÷5) + (-2/3) = (-9/5) + (-2/3) = -27 + (-10)/15 = (-27 -10)/15 = -37/15

mmc

5, 3| 3

5, 1 | 5

1, 1 3×5=15

h) (-2,7) + (-1,6) = (-2,7 - 1,6) = -4,3

i) (-126,5) + (+63,45) = (-126,5 +63,45) = -63,05