26 Mathseeds Lesson sequence TEACH Content and skills PRACTICE Children will: APPLY Animated Lesson: Revise multiplication Use repeated addition to find a total. Write a multiplication equation. Use various strategies to answer multiplication word problems. add groups together to find the total. Find the answer to a multiplication sum. Make a sum from a word problem and use a number line to find the answer. Worksheet 1 Groups Groups: Equal Rows, How Many Groups?, Apple Boxes, Goldfish Use equal rows to find a total. Calculate the number of equal groups needed for a target number. Make equal groups to calculate a total. share items into equal rows and use them to calculate the total. Add equal groups to make the total. Drag in the matching numbers of groups and find the total. Worksheet 2 Number lines Arrays: Row Upon Row, Animal Arrays Answer an equation using an array. Use arrays to calculate multiplication sums. use the array to answer the sum. Fill an array and find the total number of items. Worksheet 3 Equations Equations: Groups and Rows, Dog Treats, Train Tunnels Match a sum to a description of groups or a repeated addition. Match equations to their answers. Calculate the missing number from a multiplication sum. choose the matching multiplication equation. Select the multiplication sum that makes the total. Choose the number that completes the equation. Worksheet 4 Word problems End of Lesson Quiz Test understanding of lesson content and skills. complete a 10 question quiz to earn a reward game. Reward game: Super Slalom Learning objectives Children will: • revise repeated addition with equal groups. • use equations to represent multiplication. • answer word problems using equations and number lines. State Standards Operations & Algebraic Thinking Represent and solve problems involving multiplication and division. 3.OA.A.1 Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7 . 3.OA.A.3 Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. Key vocabulary repeated addition, multiplication, multiplying, equation, array Extra assistance Early multiplication strategies begin with adding equal groups—repeated addition, eg 3 + 3 + 3 + 3. This strategy can also be used for arrays by adding the rows. The next step should be skip counting the rows in the array to find the total, eg 3, 6, 9, 12. This strategy can be used on a number line or hundred chart as well. Eventually students could be skip counting in their heads to calculate the answer to a multiplication sum, as a step before learning their times tables. Worksheet answers Lesson 155 • Multiplication Revision Worksheet 1 1 a 2 + 2 + 2 + 2 + 2 + 2 = 12 b 3 + 3 + 3 = 9 c 5 + 5 = 10 2 a 2, 4, 6, 8, 10, 12, 14 b 3, 6, 9, 12, 15 c 5, 10, 15, 20 Worksheet 2 1 16 2 25 3 21 4 35 5 90 6 10 Worksheet 3 1 a 10 × 4 = 40 b 2 × 4 = 8 c 5 × 3 = 15 d 3 × 4 = 12 e 10 × 3 = 30 f 6 × 5 = 30 2 a 20 b 10 c 9 d 27 e 2 f 2 g 40 h 10 i 10 Worksheet 4 1 15 2 60 3 50 4 12 5 18 6 70 7 8 8 30