Subtracting 3

Learning Objectives Subtract 3 from any number between 3 and 10. Subtract 3 from any number between 11 and 20. Use a number line to show subtracting 3. Draw pictures to solve 'take away 3' problems. Count backward three numbers from a starting number. Solve simple word problems that involve subtracting 3. You have 7 shiny balloons 🎈. If 3 fly away, how many are left? Today, we will learn a special skill: subtracting 3! We will take away 3 from a group. This helps us know how many things are left. Real-World Applications Sharing 3 of your toys with a friend. Eating 3 crackers from your snack plate. Giving 3 stickers to your brother or sister. Seeing 3 birds fly away from a tree.

TermDefinitionExample SubtractSubtract means to take away from a group. The group gets smaller.If you have 5 apples 🍎🍎🍎🍎🍎 and you subtract 3, you take 3 away. Minus Sign (-)This little line is the minus sign. It tells us to subtract.The problem 5 - 3 = 2 uses a minus sign. DifferenceThe difference is the answer you get when you subtract.In 5 - 3 = 2, the number 2 is the difference. Take AwayTake away is another way to say subtract. It means the same thing.7 take away 3 is the same as 7 - 3. Count BackCounting back is a way to subtract. You count backward from the big number.For 8 - 3, you start at 8 and count back: 7, 6, 5. The answer is 5. Number LineA number line is a line with numbers on it. It helps us see subtraction.To solve 10 - 3, you can start at 10 and hop back 3 spaces.

The Picture Rule Draw the big number, then cross out 3. Use this when you want to see the problem. Draw dots or shapes, then cross 3 out. The Counting Back Rule Say the big number, then count back 3 times. Use this in your head or with your fingers. Don't count the starting number! The Number Sentence N - 3 = D This shows how to write the problem. N is the starting number, and D is the difference.