Certainly! Let's solve the arithmetic operation step-by-step to find the answer:
1. Step 1: Start with the first two numbers.
[tex]\[
-40 + 70
\][/tex]
Adding these together, we get:
[tex]\[
-40 + 70 = 30
\][/tex]
2. Step 2: Take the result from Step 1 and add the next number.
[tex]\[
30 + 40
\][/tex]
Adding these together, we get:
[tex]\[
30 + 40 = 70
\][/tex]
3. Step 3: Finally, take the result from Step 2 and subtract the last number.
[tex]\[
70 - 90
\][/tex]
Subtracting these together, we get:
[tex]\[
70 - 90 = -20
\][/tex]
So, the final result is:
[tex]\[
-40 + 70 + 40 - 90 = -20
\][/tex]
