If there are 7 marbles in a box and Gregory puts 73 more marbles inside, how many marbles are in the box?

To find out how many marbles are in the box, simply add the original 7 marbles to the 73 new marbles Gregory added. So, 7 + 73 equals 80. Voilà! There are a total of 80 marbles in the box now. If you ever find yourself in a similar situation, always remember to break down the problem into smaller parts. Start with the original amount, add any additional items step by step, and don’t forget to double-check your math! It’s often the simple addition that trips people up, especially when excitement about new additions comes into play.