Complete the subtraction sentence - up to three digits

Learning Objectives Identify the minuend, subtrahend, and difference in a subtraction sentence. Explain the relationship between subtraction and addition as inverse operations. Apply inverse operations to find a missing minuend in a subtraction sentence. Apply inverse operations to find a missing subtrahend in a subtraction sentence. Accurately solve subtraction sentences with an unknown, involving numbers up to three digits. Perform regrouping correctly when solving subtraction problems with missing numbers. Verify the solution to a completed subtraction sentence using addition or direct subtraction. Ever wondered how detectives solve mysteries? 🕵️‍♀️ In math, we can be number detectives to find missing numbers in subtraction problems! In this lesson, you'll learn h...

TermDefinitionExample Subtraction SentenceAn equation that shows one number being taken away from another to find a difference.$50 - 20 = 30$ MinuendThe first number in a subtraction sentence, from which another number is subtracted.In $50 - 20 = 30$, the minuend is $50$. SubtrahendThe second number in a subtraction sentence, which is being subtracted from the minuend.In $50 - 20 = 30$, the subtrahend is $20$. DifferenceThe result or answer of a subtraction problem.In $50 - 20 = 30$, the difference is $30$. Unknown/Missing NumberA blank space or a variable (like a letter) that represents a number that needs to be found to complete a mathematical sentence.In $75 - ext{___} = 25$, the blank is the unknown. Inverse OperationsOperations that undo each other. Addition is the inverse of subtra...

Finding the Minuend $\text{Minuend} - \text{Subtrahend} = \text{Difference} \implies \text{Minuend} = \text{Difference} + \text{Subtrahend}$ If the first number (the minuend) in a subtraction sentence is missing, you can find it by adding the subtrahend and the difference. This uses the inverse operation of addition. Finding the Subtrahend $\text{Minuend} - \text{Subtrahend} = \text{Difference} \implies \text{Subtrahend} = \text{Minuend} - \text{Difference}$ If the second number (the subtrahend) in a subtraction sentence is missing, you can find it by subtracting the difference from the minuend. Finding the Difference $\text{Minuend} - \text{Subtrahend} = \text{Difference}$ If the result (the difference) of a subtraction sentence is missing, you simply perform the st...