Sum and difference

Learning Objectives Point to the plus sign (+) and say 'plus' or 'add'. Point to the minus sign (-) and say 'minus' or 'subtract'. Point to the equals sign (=) and say 'equals'. Identify the word 'sum' as the answer to an addition problem. By the end of of this lesson, students will be able to identify the word 'difference' as the answer to a subtraction problem. Use the words 'add' and 'subtract' to describe actions with objects. Do you like getting more toys? 🧸➡️🧸🧸 What words can we use for that? We will learn special math words. These words help us talk about numbers. Knowing them makes math easy and fun! Real-World Applications Sharing snacks with a friend 🥨 Counting how...

TermDefinitionExample AddTo put groups together. You get more!I add my 2 red blocks 🟥🟥 and 1 blue block 🟦. Plus Sign (+)This little sign tells us to add. It looks like a small 't'.2 + 1 means two and one more. SubtractTo take something away. You have less.I have 3 cookies 🍪🍪🍪. I subtract 1 by eating it. Minus Sign (-)This little sign tells us to subtract. It is a straight line.3 - 1 means three take away one. Equals Sign (=)This sign means 'is the same as'. It shows the answer.2 + 1 = 3. The two sides are the same. SumThe sum is the answer when you add. It's the total.In 2 + 1 = 3, the sum is 3. DifferenceThe difference is the answer when you subtract. It's what is left.In 3 - 1 = 2, the difference is 2.

The Add Rule (Plus) Part + Part = Whole Use this when you put things together. The answer (sum) is bigger. The Subtract Rule (Minus) Whole - Part = Part Left Use this when you take things away. The answer (difference) is smaller. The Equals Rule This Side = That Side The equals sign shows that both sides have the same amount.