Addition and subtraction sentences: true or false?

Learning Objectives Identify the equal sign (=) as meaning 'the same as'. Solve simple addition problems within 20. Solve simple subtraction problems within 20. Determine if an addition sentence is true or false. Determine if a subtraction sentence is true or false. Explain why a number sentence is true or false. Imagine a friend says 2 apples + 3 apples = 6 apples. 🤔 Is that right? Let's be math detectives and find out! Today, we will look at math sentences. We will check if they are correct or incorrect. This helps us make sure our answers are right! Real-World Applications Checking if you have enough snacks for your friends. 🍎🍎🍎 Making sure you get the right number of toys. 🧸 Sharing crayons fairly with a classmate. 🖍️ Counting your coins to...

TermDefinitionExample Math SentenceA math problem with numbers and signs, like + or -. It's also called an equation.8 + 2 = 10 is a math sentence. Equal Sign (=)This special sign means 'is the same as'. Both sides must be equal.In 3 + 4 = 7, the equal sign tells us 3 + 4 is the same as 7. TrueTrue means something is correct. It makes sense! ✅The sentence 5 + 1 = 6 is true because 5 plus 1 really is 6. FalseFalse means something is not correct. It's a mistake! ❌The sentence 2 + 2 = 5 is false because 2 plus 2 is 4, not 5. Plus Sign (+)This sign tells us to add numbers together. We get a bigger number.In 6 + 3, we add 6 and 3 together. Minus Sign (-)This sign tells us to subtract or take away. We get a smaller number.In 9 - 4, we take 4 away from 9.

The True Rule Left Side = Right Side A math sentence is TRUE if the value on the left of the = is the same as the value on the right. The False Rule Left Side \neq Right Side A math sentence is FALSE if the value on the left of the = is different from the value on the right.