Subtract numbers up to millions: word problems

Learning Objectives Identify keywords in word problems that indicate subtraction. Translate word problems involving subtraction of large numbers into mathematical expressions. Set up and perform subtraction of multi-digit numbers (up to millions) accurately. Solve multi-step word problems involving subtraction of numbers up to millions. Interpret the results of subtraction in the context of the original word problem. Check the reasonableness of answers to subtraction word problems. Ever wonder how stores keep track of how many items they've sold from their initial stock? 🛍️ It's all about subtraction! In this lesson, you'll learn how to tackle word problems that require subtracting large numbers, up to millions. Mastering this skill will help you solve real-l...

TermDefinitionExample SubtractionThe mathematical operation of finding the difference between two numbers.If you have 15 apples and eat 7, you subtract 7 from 15 to find 8 remaining. MinuendThe number from which another number is subtracted (the larger number in a standard subtraction problem).In the problem $5,000 - 2,500 = 2,500$, the minuend is $5,000. SubtrahendThe number that is being subtracted from the minuend.In the problem $5,000 - 2,500 = 2,500$, the subtrahend is $2,500. DifferenceThe result obtained when one number is subtracted from another.In the problem $5,000 - 2,500 = 2,500$, the difference is $2,500. Keywords for SubtractionWords or phrases in word problems that often indicate that subtraction is the required operation.Common keywords include 'how many left', &...

Standard Subtraction Algorithm $A - B = D$ Align numbers by place value (ones under ones, tens under tens, etc.). Subtract column by column starting from the rightmost digit (ones place). If a digit in the minuend is smaller than the corresponding digit in the subtrahend, regroup (borrow) from the digit in the next higher place value. Identifying Subtraction Keywords Look for specific words or phrases in the word problem. If the problem asks for 'the difference', 'how much more/less', 'how many are left', 'remaining', 'decrease by', or 'take away', it usually indicates a subtraction operation. The initial or larger quantity is the minuend, and the quantity being removed or compared is the subtrahend. Checking Su...