Question

（4,2-28/5）*5*1/4+2,4:（-2）

Answer 1

1) 4,2 - 28/5 = 4 2/10 - 5 3/5 = 4 1/5 - 5 3/5 = -1 2/5
2) -1 2/5 * 5 = -7/5 * 5 = -35/5 = -7
3) -7 * 1/4 = - 7/4
4) 2,4 : (-2) = 2 4/10 : ( -2/1) = 2 2/5 * (-1/2) = 12/5 * (-1/2) = -12/10 = -6/5
5) -7/4 + (-6/5) = -35/20 + (-24/20) = - 59/20 = -2 19/20

Answer 2

To solve the expression, let's break it down step by step:

Step 1: Calculate within parentheses. (4,2-28/5) = (4,2-5.6) = -1.4

Step 2: Perform division and multiplication from left to right. -1.4 * 5 = -7

Step 3: Continue with multiplication and division. -7 * 1/4 = -7/4 = -1.75

Step 4: Perform division and addition/subtraction from left to right. 2,4 / (-2) = -1.2

Step 5: Perform addition. -1.75 + (-1.2) = -2.95

Therefore, the final result of the expression (4,2-28/5)51/4+2,4/(-2) is approximately -2.95.