Complete the addition sentence - up to two digits

Learning Objectives Identify the parts of an addition sentence (addends and sum). Find a missing addend in an addition sentence. Use subtraction to solve for a missing addend. Use a 'counting up' strategy to find the missing number. Write the complete addition sentence with the correct numbers. Check their answer by adding the two parts to get the whole. You have 20 toy cars 🚗. You get more for your birthday. Now you have 32! How many new cars did you get? 🤔 We will learn how to find missing numbers in addition problems. It's like being a math detective 🕵️‍♀️! This helps us solve puzzles and understand numbers better. Real-World Applications Figuring out how many more points you need to win a game 🏆. Knowing how much more money you need to save for a...

TermDefinitionExample Addition SentenceA math sentence that uses a plus sign (+) to add numbers. ➕15 + 10 = 25 is an addition sentence. AddendThe numbers that you are adding together. They are the parts.In 15 + 10 = 25, the numbers 15 and 10 are the addends. SumThe answer to an addition problem. It is the total or whole. 🎉In 15 + 10 = 25, the number 25 is the sum. Missing AddendThe mystery number or the part that is unknown in the sentence.In 15 + ___ = 25, the blank is the missing addend. Equals Sign (=)This sign means 'is the same as'. Both sides must be equal.What is on the left of the = must be the same amount as what is on the right.

Part-Part-Whole Relationship Addend + Addend = Sum Two parts (the addends) come together to make a whole (the sum). Finding a Missing Part (Subtraction) Sum - Addend = Missing Addend To find a missing part, you can subtract the part you know from the whole. Commutative Property of Addition a + b = b + a You can switch the order of the addends and the sum stays the same. 12 + 10 is the same as 10 + 12.