Parent Activity Title Exploring Division Parent During the past few weeks, 4th grade mathematics classes learned Information about multiplication concepts and facts. This includes exploring relationships between multiplication and division through different models. Your child has also learned about patterns in the multiplication table. You can expect to see in their assignments practice problems with multiplication and division. Below is a sample of how your child has been taught to relate multiplication and division. Benchmark Objective MA.4.A.1.1 – Use and describe various models for multiplication in problem-solving situations, and demonstrate recall of basic multiplication and related division facts with ease. Your child will explore the relationship between multiplication and division. Adapted from Houghton Mifflin Harcourt School Publishers www.thinkcentral.com and Hands-On Standards ETA Cuisenaire www.etacuisenaire.com Vocabulary Multiply – To combine equal groups to find how many in all. Divide – To separate into equal groups. Fact family – A set of multiplication and division sentences showing related facts. Inverse operations – Operations that undo each other. Multiplication and division are opposite operations, or inverse operations. Array - An arrangement of objects in rows and columns. Example: Duration Materials Procedures 30 minutes Two color counters (24) or something similar, division recording sheet, paper, pencil Introduce the problem. There are 24 students in Mrs. Lopez’s class. Mrs. Lopez divided the class into groups of 4 students. How many groups are there? Give your child two-color counters or something similar and the recording sheet. 1. Have your child divide the counters into equal groups of 4. (Let them know this is one way to show 24 divided into equal groups of 4.) 2. Ask the question: What division sentence are you modeling? 3. Have your child use their groups to construct an array to show the product of 6 and 4. 4. Ask the question: What multiplication sentence is displayed? 5. Have your child fill in the Multiplication and Division Recording Sheet, using the counters to assist them. 6. Have your child use arrays of counters to model the other ways of dividing 24 into equal groups. As they complete the model they should write a division and multiplication sentence for each one. Adapted from Houghton Mifflin Harcourt School Publishers www.thinkcentral.com and Hands-On Standards ETA Cuisenaire www.etacuisenaire.com Sample FCAT Activities Mrs. Pate is displaying science projects on tables in the lunch room for the science fair. She can display 6 projects on each table. If there are 72 projects to display, what is the total number of tables Mrs. Pate will need? Answer is 12. Florida Department of Education (www.fldoe.org) Additional Virtual Counters iTools Resources and BrainPoPJr.: Multiplication & Division and Arrays Information (found on the Learning Tools Website) Adapted from Houghton Mifflin Harcourt School Publishers www.thinkcentral.com and Hands-On Standards ETA Cuisenaire www.etacuisenaire.com Multiplication and Division Recording Sheet Division Sentence Multiplication Sentence Adapted from Houghton Mifflin Harcourt School Publishers www.thinkcentral.com and Hands-On Standards ETA Cuisenaire www.etacuisenaire.com