A 60-minute lesson in which students will divide decimals by whole numbers.
Remind the students of the scenario from the previous lesson. By multiplying the cost of each pizza by the number of pizzas needed, the total cost could be calculated ($63.00).
Present the following scenario to the students: Your four friends want to share the cost of the pizzas. What calculation would they need to do to work out how much money each friend needs to contribute?
Discuss the steps involved in dividing decimal numbers by whole numbers, as outlined on slide 22 of the Operations with Decimals PowerPoint. Highlight the importance of lining up the decimal points in the question and the answer when performing these calculations.
Display and discuss the annotated examples of dividing decimal numbers by whole numbers on slides 23-24. Demonstrate how the process is similar to division calculations involving whole numbers.
As a class, use this process to work out how much money each friend must contribute towards the cost of the pizzas in the tuning in scenario ($15.75).
Display the review questions on slide 25. Monitor and support the students as they individually complete the questions on the slide.
Display and discuss the answers to the review questions on slide 26. As the students correct their answers, encourage them to raise any queries or concerns.
Review the content of the unit so far. Ask the students:
How do we add and subtract decimals?
How do we multiply decimal numbers by whole numbers?
How do we divide decimal numbers by whole numbers?
Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written me...