Adding 9

Learning Objectives Add 9 to any single-digit number. Use the 'Make a Ten' strategy to solve addition problems with 9. Recognize that adding 9 is the same as adding 10 and then subtracting 1. Write a number sentence for an 'adding 9' word problem. Quickly recall addition facts for adding 9. Explain their strategy for solving an 'adding 9' problem. You have 7 shiny stickers. ✨ Your friend gives you 9 more! How many do you have now? Today, we will learn a super trick to make adding 9 easy and fast. This trick is called 'Make a Ten'. It helps us solve problems without counting on our fingers forever! Real-World Applications Counting your toys when you get a new set of 9. Figuring out how many snacks you have for a party. Adding...

TermDefinitionExample AddTo put numbers together to find the total amount. ➕We add 4 apples and 9 apples to find the total. SumThe answer you get when you add numbers together.In 5 + 9 = 14, the sum is 14. Plus Sign (+)This symbol tells us to add numbers.We see it in the middle: 3 + 9. Equals Sign (=)This symbol means 'is the same as'. It shows the answer.It comes right before the sum: 3 + 9 = 12. Make a TenA smart trick where we turn a number into 10 to make adding easier.For 9 + 5, we can think of it as 10 + 4. Number SentenceA math sentence that uses numbers and symbols.8 + 9 = 17 is a complete number sentence.

The 'Make a Ten' Strategy n + 9 = (n - 1) + (9 + 1) = (n - 1) + 10 Take 1 from the other number and give it to the 9. This turns the 9 into a 10, which is super easy to add! The 'Add 10, Subtract 1' Trick n + 9 = (n + 10) - 1 Adding 10 is easy! Just add 10 to your number, then hop back one space to get the real answer for adding 9.