Question

Oblicz :

a) 2,2+12/7+(−1,2)+(− 5/7)

b) 6 1/2+(−3,25)+ (− 1 3/4)+1

c) 3,9 +5/8 +(−0,1) + 0,375

d)−(−(−3) + (−2))+(−(−3))

e) −15+ (−4−(−7))−(−8)+(−11)

f)28−39+(−14)−(−12)−81

g)37+(−18)−(−(48((+(−9)

Błagam pomóżcie z góry dzięki i pozdrowionka .. pilne dzięki :**

Answer 1

a)

2,2 + 1 2/7 + ( -1,2) + (-5/7) =  2 2/10 + 1 20/70 - 1 2/10 - 5/7 = 

= 2 14/70 + 1 20/70 - 1 14/70 - 50/70 = 3 34/70 - 1 64/70 = 2 104/70 - 1 64/70 = 1 40/70 = 1 4/7

 

b) 6 1/2 + (- 3,25) + (- 1 3/4) + 1= 6 1/2 - 3 25/100 - 1 3/4 + 1 = 6 2/4 - 3 1/4 - 1 3/4 + 1 =

= 3 1/4 - 3/4 = 2 5/4 - 3/4 = 2 2/4 = 2 1/2

 

c) 3,9 + 5/8 + (-0,1) + 0,375 = 3 9/10 + 5/8 - 1/10 + 375/1000= 3 8/10 + 5/8 + 15/40 = 

= 3 32/40 + 25/40 + 15/40 = 3 72/40= 4 32/40= 4 4/5

 

d) 

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

 

e)

- 15 + ( -4 - (-7)) - (-8) + (-11)= -15 + (-4+7) +8 -11= -15 + 3+8 - 11 = -15

 

f)

28 - 39 + (-14) - (-12) -81 = -11 - 14 + 12 - 81 = - 94

 

g)

37 + (-18) - (-(48((+(-9))))) = 37 - 18 - (-(48-9))= 37-18 - (-39)= 19+39 = 58