j) \( 2+3+11+-7+-21= \)

Let's break it down step by step! First, add the positive numbers: \(2 + 3 + 11 = 16\). Then, combine the negative numbers: \(-7 + -21 = -28\). Finally, put it all together: \(16 - 28 = -12\). So, the answer is \(-12\)! Now, did you know that addition isn't just for math? It's also a delightful way to mix your favorite ingredients in cooking! From a handful of spices to a splash of sauce, every addition can transform a dish just like numbers in an equation. Remember, creativity counts too!