Когда оксана прочитала 6 страниц книги ей осталось читать в 10 раз больше. сколько страниц в книге?

1)10*6=60(к.) 2)60+6=66(к.) ответ: в книге 66 страниц

пошаговое объяснение:

1) (-3.8+2 1/3)*(-1 7/8) + 4 1/6 : (-1 2/3)=1,5

-3,8+2 1/3=-3 4/5+2 1/3=-19/5+7/3=

=(-19*3+7*5)/15=-36/15

-36/15*(-1 7/8) =36/15*15/8=4

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

=-2,5

4-2,5=1,5

2) (2.5-1 5/6): 1 4/9 - 3 5/9 *(-2 1/4)=8 6/13

2.5-1 5/6=2 1/2-1 5/6= 5/2-11/6=(5*3-11)/6=4/6=2/3

2/3: 1 4/9=2/3*9/13=6/13

- 3 5/9 *(-2 1/4)=32/9*9/4=8

6/13+8=8 6/13

3) (-5/12 - 3/4) : 2 1/3 + 5 1/3 * 0.75=3,5

-5/12 - 3/4=-5/12 - 9/12=-14/12=-7/6

-7/6: 2 1/3=-7/6*3/7=-1/2=-0,5

5 1/3 * 0.75=16/3*3/4=4

-0,5+4=3,5

4)(3/4 - 1 7/8) : 3/4 + 3 1/9 *3/7=-1/6

3/4 - 1 7/8=(6-15)/8=-9/8

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

3 1/9 *3/7=28/9*3/7=4/3

-3/2+4/3=(-9+8)/6=-1/6

ответ:

пошаговое объяснение:

1)

(-4/5) × (-3/8) × (-5/12) = ((-4/5) × (-3/8)) × (-5/12) = ((-1/5) × (-3/2)) × (-5/12) =

= (-1/5) × ((-3/2) × (-5/12)) = (-1/5) × (-1/2) × (-5/4) = ((-1/5) × (-5/4)) × (-1/2) =

= (-1/1) × (-1/4) × (-1/2) = -1/8

2)

(-9/10) × 5/6 × (-2/3) = ((-9/10) × 5/6) × (-2/3) = (-3/2) × (1/2 × (-2/3)) =

= ((-3/2) × (-1/3)) × 1/1 = (-1/2) × (-1/1) × 1 = 1/2

3)

(-7/8) × (-5/6) × (-24/25) = ((-7/8) × (-24/25)) × (-5/6) = (-7/1) × ((-3/25) × (-5/6)) =

= (-7) × (-1/5) × (-1/2) = (-7/10) = -0,7

4)

(-35/44) × 63/100 × 22/45 × (-2целых 2/7) = ((-35/44) × 22/45) × (63/100) × (-16/7) =

= (-7/2) × 1/9 × 9/25 × (-4/1) = ((-7/2) × (-4)) × (1/9 × 9/25) = (-7) × (-2) × 1 × 1/25 =

= 14 × 1/25 = 14/25