1. **State the problem:** Calculate the result of the arithmetic operations in the first column labeled 10: $$+720 + 157 - 557 + 665 - 675$$. 2. **Show the formula and rules:** Addition and subtraction are performed from left to right. 3. **Calculate step-by-step:** $$720 + 157 = 877$$ $$877 - 557 = 320$$ $$320 + 665 = 985$$ $$985 - 675 = 310$$ 4. **Final answer:** The result of the operations in column 10 is **310**.