# Lesson Plan: Insects

Subject:  Math

Lesson Objective850游戏官方安卓下载: To use multiplication and division to solve equations

Common Core Standard850游戏官方安卓下载:  : Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = _ ÷ 3, 6 × 6 = ?

Materials:

Starter:

Say:

• When are some times that you use either multiplication or division? (Allow the students to answer.)

Main:

Say:

• Multiplication is used when you need to add or put numbers together quickly.  Multiplication is much faster than addition.
• For example, if you needed to add 5 four times, instead of adding, you could multiply 5 and 4 to get 20.
• Division is used when you need to divide numbers quickly.  Division is much faster than subtraction.
• For example, instead of subtracting 6 from 36 to figure out how many groups you would have, you can just divide 36 by 6 to get 6.
• Any easy way to learn multiplication and division is by learning fact families.
• A number or fact family is a group of equations that are made using the same set of numbers.  A number or fact family shows the relationships between the three numbers used.
• When learning math facts, it is important to understand how numbers work together in an equation.  A number or fact family helps you understand.
• If you look at an equation and notice that a number is missing, you should think about fact families and that will help you to figure out the missing number.
• Now, you are going to do a worksheet with multiplication and division problems.  Remember to think about fact families when doing them.  When you are done, we will go over all of the answers.
• Does anyone have any questions?

Feedback:

Say:

• Who would like to share your answers?  (Allow the students to share.)

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Written by Kimberly Greacen, Education World® Contributing Writer

Kimberly is an educator with extensive experience in curriculum writing and developing instructional materials to align with Common Core State Standards and Bloom's Taxonomy.