Question

1)-1,65х(-2,8); 2)-0,72х1 1/9; 3)-25,2:0,18; 4)-3 7/15:(-2 3/5)

Answer 1

Ответ:

1)4,62х

3)140

4)4/3

Вот ответы надеюсь всё правильно

Answer 2

Let's solve each of these mathematical expressions step by step:

1. -1 * 65 * (-2.8) = -1 * 65 * 2.8 (since - multiplied by - is positive) = -182

2. -0.72 * 1 1/9 First, convert 1 1/9 to an improper fraction: 1 * 9 + 1 = 10/9 = -0.72 * 10/9 Now, multiply the fractions: = (-0.72 * 10) / 9 = -7.2 / 9 Simplify the fraction: = -0.8

3. -25.2 / 0.18 = -252 / 18 (since 0.18 = 18/100) To simplify this fraction, divide both the numerator and denominator by their greatest common divisor (which is 18): = (-14) / 1 = -14

4. -3 7/15 / (-2 3/5) First, convert the mixed numbers to improper fractions: -3 7/15 = -3 * 15 + 7 = -45 + 7 = -38/15 -2 3/5 = -2 * 5 + 3 = -10 + 3 = -7/5

   Now, divide the fractions: = (-38/15) / (-7/5) When dividing fractions, multiply by the reciprocal of the divisor: = (-38/15) * (-5/7) Multiply the numerators and denominators separately: = (38 * 5) / (15 * 7) = 190 / 105

   To simplify the fraction, divide both the numerator and denominator by their greatest common divisor (which is 5): = 38 / 21

So, the results are:

1. -182
2. -0.8
3. -14
4. 38/21