Write the addition sentence - up to three digits

Learning Objectives Identify the parts of a story problem that need to be added. Correctly place the plus (+) and equal (=) signs in a number sentence. Write a complete addition sentence for numbers up to three digits. Translate a picture-based problem into a written addition sentence. Define the terms 'addend' and 'sum'. Explain that an addition sentence combines two or more parts to find a total. Imagine you have 120 shiny marbles and get 45 more! How would we write that down using math? 🤔 Today, we will learn how to be math detectives! 🕵️ We will turn stories and pictures into addition sentences. This helps us organize numbers to find the total. Real-World Applications Counting the total number of toys in two different toy boxes. Finding out ho...

TermDefinitionExample Addition SentenceA math sentence that uses a plus sign (+) to combine numbers.132 + 210 = 342 is an addition sentence. AddendThe numbers that you are adding together in an addition sentence. They are the parts.In 225 + 100, the numbers 225 and 100 are the addends. Plus Sign (+)The symbol that tells us to add numbers together. It means 'and' or 'more'.We use it like this: 56 + 20. Equal Sign (=)The symbol that means 'is the same as'. It shows what the total is.150 + 100 = 250. The equal sign points to the answer. SumThe answer to an addition problem. It is the total or the whole amount.In 110 + 20 = 130, the number 130 is the sum. Three-Digit NumberA number that has three places: hundreds, tens, and ones.Numbers like 123, 456, and 987 are...

The Addition Sentence Structure Addend + Addend = Sum This is the pattern for every addition sentence. Put one part, then the plus sign, then the other part. Then, add the equal sign and the total (or a question mark if you need to find it). The Order Rule (Commutative Property) a + b = b + a You can switch the addends around, and the sum will stay the same! 120 + 50 is the same as 50 + 120. Isn't that cool? ✨