Question

5,7 +(8,1 - 4,7)3.39 - (1,39 - 4,5)3.7- (-5,3 +3,7)4,9-(4,9-2,4)​

Answer 1

5.7+(8.1-4.7)=9.1(перепутала)

1)8.1-4.7=3.4

2)5.7+3.4=9.1

3.39-(1.39-4.5)=6.5

1)1.39-4.5=-3.11

2)3.39-(-3.11)= 6.5

3.7-(-5.3+3.7)=5.3

1)-5.3+3.7=-1.6

2)3.7-(-1.6)=5.3

4.9-(4.9-2.4)=2.4

1)4.9-2.4=2.5

2)4.9-2.5=2.4

Answer 2

To simplify the given expression, let's perform the calculations step by step:

1. Start with the innermost parentheses: (8.1 - 4.7) and (1.39 - 4.5):

   (8.1 - 4.7) = 3.4 (1.39 - 4.5) = -3.11

   The expression becomes: 5,7 + 3.4 * 3.39 - (-3.11) * 3.7 - (-5.3 + 3.7) * 4.9 - (4.9 - 2.4)

2. Perform the multiplication and addition inside each set of parentheses:

   • (-3.11) = 3.11
   • (-5.3 + 3.7) = -1.6
   • (4.9 - 2.4) = 2.5

   The expression becomes: 5.7 + 3.4 * 3.39 - 3.11 * 3.7 - (-1.6) * 4.9 - 2.5

3. Perform the multiplications:

   3.4 * 3.39 = 11.526 3.11 * 3.7 = 11.467 (-1.6) * 4.9 = -7.84

   The expression becomes: 5.7 + 11.526 - 11.467 - (-7.84) - 2.5

4. Perform the subtractions:

   5.7 + 11.526 - 11.467 = 5.759 5.759 - (-7.84) = 13.599 13.599 - 2.5 = 11.099

Therefore, the simplified expression is 11.099.