Question

oblicz działania które są na obrazku:

Answer 1

Odpowiedź:

a)

-5/6 * (-0,2) = 5/6 * 1/5 = 1/6

b)

-[-3/4 : (-3/5)] = -(3/4 * 5/3) = -5/4 = -1 1/4

c)

2/5 * (-0,25) = 2/5 * (-1/4) = -1/10

d)

-0,6 : (-3/8) = -3/5 * (-8/3) = 8/5 = 1 3/5

e)

-2/3 : 8/9 = -2/3 * 9/8 = -3/4

f)

-0,28 * 2/7 = -28/100 * 2/7 = -7/25 * 2/7 = -2/25 = 0,08

g)

-[(-7/9) : (-2/3)] = -(7/9 * 3/2) = -7/6

h)

-(-0,8 : 1/2) = -(-4/5 * 2) = 8/5 = 1 3/5 = 1,6

a)

-2 7/8 : (-5 3/4) = -23/8 : (-23/4) = 23/8 * 4/23 = 1/2

b)

-[(-2 7/9) * (-0,54)] = -(25/9 * 54/100) = -6/4 = -1 2/4 = -1,5

c)

4 1/6 : (-3,75) = 25/6 : (-3 3/4) = -25/6 : 15/4 = -25/6 * 4/15 = -5/3 * 2/3 =

= -10/9 = -1 1/9

d)

(-1 2/3) * 3 4/5 = -5/3 * 19/5 = -19/3 = -6 1/3

e)

-(-2 2/9) : (-1 13/15) = 20/9 : (-28/15) = -20/9 * 15/28 = 5/3 * 5/7 = 25/21 =

= 1 4/21

f)

-[-5 5/6 : (-1 2/3)] = -(35/6 : 5/3) = -35/6 * 3/5 = -7/2 = -3 1/2

g)

-(-3,6 : 7 1/2) = 3,6 : 7,5 = 0,48

h)

-[2 4/5 * (-4 2/7)] = -(-14/5 * 30/7) = 2 * 6 = 12

Szczegółowe wyjaśnienie: