Question

А) -3,6-2,1; б) -3/8+5/6; в) -3/10 ∶3/5; г) -4∙(-0,8); д)(-1/3)^3​

Answer 1

Ответ:

Пошаговое объяснение:

а)-5,7

б)11/24

в)-0,5

г)3,2

д)-1/27

Answer 2

А) To subtract the numbers -3.6 and -2.1, you simply subtract their decimal parts. The whole numbers remain the same.

-3.6 - (-2.1) = -3.6 + 2.1 = -1.5

Therefore, the result is -1.5.

Б) To add the fractions -3/8 and 5/6, you need to find a common denominator and then add the fractions. The common denominator is 24.

-3/8 + 5/6 = (-3/8) * (3/3) + (5/6) * (4/4) = -9/24 + 20/24 = (-9 + 20)/24 = 11/24

So, the result is 11/24.

В) To divide the fraction -3/10 by 3/5, you can multiply by the reciprocal of the divisor.

-3/10 ÷ 3/5 = (-3/10) * (5/3) = (-35)/(103) = -15/30 = -1/2

Hence, the result is -1/2.

Г) To multiply -4 by (-0.8), simply multiply the numbers.

-4 * (-0.8) = 3.2

Thus, the result is 3.2.

Д) To calculate the cube of -1/3, you need to multiply the fraction by itself twice.

(-1/3)^3 = (-1/3) * (-1/3) * (-1/3) = (-1 * -1 * -1)/(3 * 3 * 3) = -1/27

Therefore, the result is -1/27.