Question

w ZALACZNIKACH jest LEKKIE zadanie.

Potrzebne sa nie tylko odpowiedzi ale i ROZWIAZANIA :)

Dzieki!

Answer 1

a) 17/30 + 17/84 = 238/420 + 85/420 = 323/420

b) 13/49 - (-16/21) = 39/147 + 112/147 = 151/147 = 1 cała 4/147

c) -1/12 + 1/8 = - 2/24 + 3/24 = 1/24

d) (-23/24) + (-17/18) = (-69/72) - 68/72 = -137/72 = - 1 cała 65/72

e) 7/2 - (-9/4) = 14/4 + 9/4 = 23/4 = 5 całych 3/4

f) (-3/14) - 1/10 = (-15/70) - 7/70 = -22/70 = -11/35

g) (-15/16) - (-1/16) = (-15/16) + 1/16 = -14/16 = -7/8

h) 2 1/2 + 3 1/3 = 5/2 + 10/3 = 15/6 + 20/6 = 35/6 = 5 c. 5/6

i) 3 2/5 - 1 3/4 = 3 8/20 - 1 15/20 = 68/20 - 35/20 = 33/20 = 1 c. 13/20

j) 15 2/7 - 17 1/4 - 2 1/4 = 107/7 - 69/4 - 9/4 = 428/28 - 483/28 - 63/28 =

   -118/28 = -4 6/28 = -4 c. 3/14

k) -11 11/12 - 10 10/11 + 9 9/10 = -11 605/660 - 10 600/660 + 9 594/660 =

   -12 c. 611/660

l) - 2 1/5 + (-4 1/3) - (-3 2/4) = - 11/5 - 13/3 - (-3 1/2)= -11/5 - 13/3 + 7/2 =

   -66/30 - 130/30 +  105/30 = -91/30 = -3 c. 1/30

m) 2/3 x 3/4 = 1/2

n) (-81/10) x 15/18 = -27/4 = -6 c. 3/4

o) (-64/100) x (-25/32) = 1/2

p) (-81/10) : 18/15 = (-81/10) x 15/18 = - 6 c. 3/4

r) (-64/100) : (-32/25) = (-64/100) x (-25/32) = 1/2

s) 2 1/2 x 3 1/3 = 5/2 x 10/3 = 25/3 = 8 c. 1/3

t) 3 2/5 : 1 3/4 = 17/5 : 7/4 = 17/5 x 4/7 = 68/35 = 1 c. 33/35

u) -1 1/5 x (-2 1/7) = - 6/5 x (-15/7) = 18/7 = 2 c. 4/7

w) 4 2/3 : (-2 3/5) = 14/3 : (-13/5) = 14/3 x (-5/13) = -70/39 = -1 c. 31/39

y) -1 2/7 : 2 3/14 = -9/7 : 31/14 = -9/7 x 14/31 = -18/31

z) 5 1/2 x (-2 2/3) = 11/2 x (-8/3) = -44/3 = -14 c. 2/3

 

Uff, wreszcie