Multiply by 3

Learning Objectives Recall multiplication facts for 3 from 3x0 to 3x10 from memory. Use repeated addition to solve multiplication problems involving the number 3. Draw arrays and equal groups to model multiplication by 3. By the end of a lesson, students will be able to apply the Commutative Property of Multiplication to solve problems (e.g., knowing 3 x 7 is the same as 7 x 3). Solve one-step word problems that require multiplying by 3. Identify and describe patterns in the multiples of 3. Have you ever seen a tricycle? 🚲 If you have 4 tricycles, how many wheels are there in all? In this lesson, we will become experts at multiplying by the number 3! Learning your 'times 3' facts will help you solve problems much faster than just adding. It's a super skill f...

TermDefinitionExample MultiplicationA fast way to do repeated addition. It's when you combine equal groups to find the total.3 x 5 is the same as 5 + 5 + 5. FactorsThe numbers that are being multiplied together in a multiplication problem.In the problem 3 x 7 = 21, the factors are 3 and 7. ProductThe answer you get when you multiply two or more factors.In the problem 3 x 7 = 21, the product is 21. Repeated AdditionAdding the same number over and over again. Multiplication is a shortcut for this.To solve 3 x 4, you can use repeated addition: 4 + 4 + 4 = 12. ArrayA set of objects arranged in equal rows and columns, which helps you see a multiplication problem.An array for 3 x 5 would have 3 rows with 5 dots in each row. Equal GroupsGroups that all have the exact same number of items in...

The Repeated Addition Rule 3 \times n = n + n + n This shows that multiplying a number 'n' by 3 is the same as adding that number to itself 3 times. It's great for visualizing the problem. The Skip-Counting Pattern 3, 6, 9, 12, 15, 18, 21, 24, 27, 30... When you multiply by 3, the answer is always the next number you would say when skip-counting by 3s. For 3 x 4, you count four 'threes': 3, 6, 9, 12. The Commutative Property 3 \times n = n \times 3 This 'turnaround' rule means you can switch the order of the factors and the product will stay the same. If you know 8 x 3, you also know 3 x 8!