Question

dzialania na liczbach dodatnich i ujemnych

Oblicz:

a) -7 4/9 - 2 1/6 +

b) 3 1/4 - 8 5/6

c) -2 3/5 + 7 1/3

d)-3.12-6.1

e) -7.2+12.36

f) 6.4 - 10.25

g) - 3 1/7 - 1.2

h) 4 5/6 - 8.2

zad2

a -5.65 + (-2.08) - 1.35

b 6.51 + (-2.775) - 11.125

c - 10/9 + ( -1/6) + 9 3/4 - (-6.25 )

d -9.3 - (-12 1/5) -(72.8-(-13.002))

Blagam o rozwiazanie ;( daje najj

Answer 1

a)-7  4/9-2  1/6=-67/9-13/6=-134/18-39/18=-173/18=-9  11/18

b)3  1/4-8  5/6=13/4-53/6=39/12-106/12=-67/12=-5  7/12

c)-2  3/5+7  1/3=-13/5+22/3=-39/15+110/15=71/15=4  11/15

d)-3,12-6,1=-9,22

e)-7.2+12.36=5,16

f)6.4 - 10.25=-3,85

g) - 3 1/7 - 1.2= -22/7-1  2/10=-22/7-1  1/5=-22/7-6/5=-110/35-42/35=-152/35

=-4  12/35

h) 4 5/6 - 8.2=29/6-8  2/10=29/6-8  1/5=29/6-41/5=145/30-246/30=-101/30=

=-3  11/30

 

zad2

a -5.65 + (-2.08) - 1.35=-5,65-2,08-1,35=-9,08

b 6.51 + (-2.775) - 11.125=6,51-2,775-11,125=-7,39

c - 10/9 + ( -1/6) + 9 3/4 - (-6.25 )=-10/9-1/6+9  3/4+6  1/4=-10/9-1/6+39/4

+25/4=-20/18-3/18+64/4=-23/18+16=-23/18+14  36/18=14  13/18

d -9.3 - (-12 1/5) -(72.8-(-13.002))=9,3+12,2-(72,8+13,002)=

=9,3+12,2-85,802=-64,302

Answer 2

a)-7 8/18 - 2 3/18 = - 9 11/18

b)3 3/12 - 8 10/12 = - 5 7/12

c) -2 9/15 +7 5/15 =  4 11/15

d) - 9,22

e) 5,16

f) - 3,85

g) -3 1/7 - 1 2/10= -3 10/70 - 1 14/70= -4 24/70

h) 4 5/6 - 8 2/10= 4 50/60 - 8 12/60=-3 22/60

 

zad.2

-9,08

-7,39