Question

a) 4/7 – 1/7 =
b) 12/15 – 7/15 =
c) 5/6 – 2/6 =
d) 7/8 – 4/8 =
e) 3/9 – 1/9 =
f) 4/6 – 2/3 =
g) 3/8 – 1/4 =
h) 7/8 – 5/9 =
i) 5/4 – 1/2 =
j) 6/12 – 1/3 =

Answer 1

Explicação passo a passo:

a)

A= (-7-4).(-9+2)-(-72+13) = (-11).(-7)-(-59) = 77-(-59) = 77 + 59 =

➺ A = 136

B = (-5-5)+(-9-4+6) = (-10)+(-7) = -10-7 = -17

➺ B = -17

b)

A= (-9-3):(-1+7) = (-12) : (+6) = -2

➺ A = -2

B = (10-(-4-3).(-2)3 = (10-(-7).(-2)3 = (10-(+14)3 = (-4)3 = -12

➺ B = -12

c)

A= (-50):(-5-5).(-5) = (-50):(-10).(-5) = (5).(-5) = -25

➺ A = -25

B = 1(-8):(+2)-7-(-1)1-5 = (-8):(+2)-7-(-1)-5 = (-4)-7+1-5 = -11-4 = -15

➺ B = -15

❑ Subtitua os valores e responda:

a) A:B = 136 ÷ (-17) = -8 ✓

b) A-B = (-2) - (-12) = -2 + 12 = +10 ✓

c) (A-B)2 = ((-25) - (-15))×2 = (-25 + 15) × 2 = -10×2 = -20