Question

А) - 2/3 * 3/4 * (-4/5) б) 3 * (-2/5) * (-5/9) в) - 8 : 3/5 * 9/10 г) - 4/9 * 3/8 : (-2)

Answer 1

А)

-2/3*3/4*-4/5=
=2*1/5=
=2/5

б)

3*-2/5*-5/9=
=2*1/3=
=2/3

в)

-8:3/5*9/10=
=-8*5/3*9/10=
=-4*3=
=-12

г)

-4/9*3/8:(-2)=
=4/3*1/8*1/2=
=1/3*1/4=
=1/12

Answer 2

Let's calculate the given expressions:

a) - 2/3 * 3/4 * (-4/5) To multiply fractions, you multiply the numerators together and the denominators together. The negative sign in front affects the overall sign of the result. So, we have:

= (-2/3) * (3/4) * (-4/5) = (-2 * 3 * -4) / (3 * 4 * 5) = (24) / (60) = 2/5

b) 3 * (-2/5) * (-5/9) Multiplying the numbers together, we get:

= 3 * (-2/5) * (-5/9) = (-2 * -5 * 3) / (5 * 9) = (30) / (45) = 2/3

c) - 8 : (3/5) * (9/10) Dividing by a fraction is the same as multiplying by its reciprocal. So, we have:

= -8 * (5/3) * (9/10) = (-8 * 5 * 9) / (3 * 10) = (-360) / (30) = -12

d) - 4/9 * 3/8 : (-2) To divide fractions, you multiply by the reciprocal of the divisor. So, we have:

= (-4/9) * (3/8) * (-1/2) = (-4 * 3 * -1) / (9 * 8 * 2) = (12) / (144) = 1/12

Therefore, the solutions are: a) 2/5 b) 2/3 c) -12 d) 1/12