Question

b) -10-7-(-7)-18

c) - 5/9+2/3+5/9-5/6-2/3

d) -2/7+3/8-1/2+2/7-1/4+1/2

e)- 1,1+2,2+3,3-5,5+6,6

f) -3,7+2,85+4,7-4,85

g) 1 1/4-0,5-3/7-0,25+1 1/2

h)- 1/8-1/3+2,5+3 1/3-(-0,125)

Answer 1

b) -10-7-(-7)-18 = -10 + (-7) + 7 + (-18) = -28

c) - 5/9+2/3+5/9-5/6-2/3 = -5/9 + 5/9 + 2/3 - 2/3 - 5/6 = -5/6

d) -2/7+3/8-1/2+2/7-1/4+1/2 = -2/7 + 2/7 + 3/8 - 1/2 + 1/2 - 1/4 = 3/8 - 1/4 =

3/8 - 2/8 = 1/8

e)- 1,1+2,2+3,3-5,5+6,6 = 1,1 + (-2,2) + 6,6 = -1,1 + 6,6 = 5,5

f) -3,7+2,85+4,7-4,85 = -0,85 + (-0,15) = -1

g) 1 1/4-0,5-3/7-0,25+1 1/2 = 1,25 - 0,5 - 3/7 - 0,25 + 1,5 = 0,75 - 3/7 + 1,25 = 2 -3/7 = 1 7/7 - 3/7 = 1 4/7

h)- 1/8-1/3+2,5+3 1/3-(-0,125) = -3/24 - 8/24 + 2,5 + 3 8/24 + 0,125 = -11/24 + 3 8/24 + 2,625 = -11/24 + 2 32/24 + 2,625 = 2 21/24 + 2,625 = 2,875 + 2,625 = 5,5

 

Answer 2

b) -10-7-(-7)-18=-17+7-18= 8

 

c) - 5/9+2/3+5/9-5/6-2/3=-5/5

 

d) -2/7+3/8-1/2+2/7-1/4+1/2=3/8-1/4=3/8-2/8=1/8

 

e)- 1,1+2,2+3,3-5,5+6,6=1,1-2,2+6,6=-1,1+6,6=-5,5

 

f) -3,7+2,85+4,7-4,85= -2+1=-1

 

g) 1 1/4-0,5-3/7-0,25+1 1/2= 1+1-3/7= 1 i 4/7

 

h)- 1/8-1/3+2,5+3 1/3-(-0,125)=3+2,5=5,5

 

POZDRAWIAM!