Question

(0,8+0,64)(1,25*7- 4_5*1,25)+31,64=

Answer 1

1)0,8+0,64=1,44
2)1,25*7=8,75
3)8,75-4=4,75
4)5*1,25=6,25
5)4,75-6,25= –1,5
6) 1,44*(-1,5)=–2,16
7)–2,16+31,64=29,48

Answer 2

Let's simplify the given expression using the order of operations (PEMDAS) step by step:

1. First, we need to perform the multiplication and subtraction inside the parentheses:

(1,257 - 4_51,25) = (8.75 - 5.625) = 3.125

Note: In some countries, the comma is used as a decimal separator, while in others, it's a period. Here, I assume that the comma represents a decimal point.

2. Next, we need to evaluate the expression inside the first parentheses:

(0,8+0,64) = 1.44

3. Now, we can substitute the results from steps 1 and 2 into the main expression:

1.44 * 3.125 + 31.64 = 35.63

Therefore, the final answer is 35.63.