Grade 4 - Multiplying and Dividing Whole Numbers Unit
The Multiplying and Dividing Whole Numbers Unit involves using patterns and place value to develop strategies to multiply and divide whole numbers. Questions to answer may include:
- How are models useful for representing the processes of multiplication and division? (Models might include equal jumps on a number line, arrays/area models, or base ten materials.)
- How are the properties of place value (additive, multiplicative, base-ten & positional) useful in developing efficient procedures for multiplying and dividing whole numbers?
- How can mental math, rounding, and/or the use of compatible numbers help to determine whether the solution to a multiplication or division problem is reasonable?
Math Concepts and Skills:
The student develops and uses strategies for multiplying and dividing whole numbers in order to solve problems.
The student:
- uses a variety of strategies to multiply up to a four-digit number by a 1-digit number and to multiply a 2-digit number by a 2-digit number.
- uses a variety of strategies to divide up to a 4-digit dividend by a 1-digit divisor.
- estimates solutions to problems involving whole numbers by rounding to the nearest 10, 100, or 1,000 or by using compatible numbers.
- solves 1-and 2-step problems involving multiplication and division including interpreting remainders.
Summative Assessment Task
Students determine how many pencils Mrs. P will need to order for next year's class.
Instructional Tasks/Formative Assessments
Students determine how how much money the soccer team will raise selling sport posters.
Students determine how many small and large bags of stickers need to be sold to earn $20.00 to buy two games.
Students determine if four children can share the money in Grandfather's wallet equally.
Given a number of jelly beans in a bowl, students determine how to share the jelly beans among three friends equally.