Question

А)5.6-(4.5+b), если b=-2.4 б)0.4-(-x+1.2)+ x если x=-0.3

Answer 1

$1) \: 5.6 - 4.5 - b = 1.1 + 2.4 = 3.5 \\ 2) \: 0.4 + x - 1.2 = - 0.8 + x = - 0.8 - 0.3 = - 1.1$

Answer 2

Let's solve the given expressions:

а) For the expression 5.6 - (4.5 + b), where b = -2.4: Substitute the value of b into the expression:

5.6 - (4.5 + (-2.4))

Now, perform the operations inside the parentheses first:

5.6 - (4.5 - 2.4)

Next, subtract the values inside the parentheses:

5.6 - 2.1

Finally, perform the subtraction:

5.6 - 2.1 = 3.5

So, the result is 3.5.

б) For the expression 0.4 - (-x + 1.2) + x, where x = -0.3: Substitute the value of x into the expression:

0.4 - (-( -0.3 ) + 1.2) + ( -0.3 )

Now, perform the operations inside the parentheses first:

0.4 - (0.3 + 1.2) - 0.3

Next, add the values inside the parentheses:

0.4 - 1.5 - 0.3

Finally, perform the subtraction:

0.4 - 1.5 - 0.3 = -1.4

So, the result is -1.4.