Just multiply then add them and if the answer is to big then add and if it is to small sorry not that good at math but I️ try
Answer to the math question is:
126
Well 2.5 + 2.5 is 5 so 5 - 2.5 is 2.5
240, you just add a zero to 24, I don't know what you mean by zero the hero of 4 square, hope this helps!
The answer is 63.3
9.5 * 3 + 8.7 * 4 = 63.3