Question

срочно очень даю 30 балов​

Answer 1

Ответ:

1 1/2 или 1,5

Пошаговое объяснение:

1) 3 1/2 - 2 2/3 = 3 3/6 - 2 4/6 = 2 9/6 - 2 4/6 = 5/6

2) 0,9 * 5/6 = 9/10 * 5/6 = 3/2 * 1/2 = 3/4

3) 2 : (-2 2/3) = 2 : (-8/3) = 2 * (-3/8) = -6/8 = -3/4

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

Answer 2

Ответ:  1.5.

Пошаговое объяснение:

0.9(3 1/2 - 2 2/3) -2:(-2 2/3) = 1.5.

1)  3 1/2-2 2/3 => НОД(2;3)=6=>3 3/6 - 2 4/6 = 1 (3-4)/6 = (6+3-4)/6 = 5/6;

2)  0.9*5/6 = 9/10*5/6 =  3/4;

3)  2:(-2 2/3) = - 2:8/3 = -2*3/8 = -3/4;

4) 3/4-(-3/4) = 3/4+3/4 = 6/4 = 1 2/4 = 1 1/2 = 1.5.