Example: \( 297654-50=297604 \) a. 378457 \( \qquad \) \( =308457 \) b. 421873 \( \qquad \) \( =401873 \) c. \( 887114=887100 \) \( \square \) \( \square \) \( \square \) d. 316522 \( \qquad \) \( =96522 \) e. \( 124893 \quad=100893 \) f. 737896 \( \qquad \) \( =732096 \) \( \square \) \( \square \) \( \square \) 5. Complete the table. Always add and subtract from the number given in the first column.
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Bonus Knowledge
Let’s dive into a little mathematical history! Subtraction, which we often take for granted, has deep roots that trace back to ancient civilizations such as the Egyptians and Babylonians. They initially used counting beads and various symbols for calculations, establishing foundational methods that enabled generations to build upon them. Imagine chalkboards filled with numbers, slowly unearthing the magic of subtraction! Now, let’s talk about some real-world applications! Subtraction is crucial in day-to-day life, whether you're managing a budget, calculating discounts during shopping, or determining how much money is left after a purchase. It not only helps keep finances in check but also enhances your ability to analyze data, leading to smarter decisions. So, whether you're at the store or balancing your bank account, subtraction is your trusty companion!