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# Lesson 5: Dividing Decimals by Whole Numbers

Operations with Decimals and Percentages Unit Plan - Year 5 and Year 6 | Lesson 5 | 60 minutes

A 60 minute lesson in which students will divide decimals by whole numbers.

## Lesson Plan

### Tuning In

- 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/£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?

### Teacher Instruction

- 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/£15.75).

### Guided/Independent Learning

- 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.

### Wrapping Up

- 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?

## Differentiation

### Extending Students

- Provide any fast finishers with the second page of the
*Decimals Worksheet - Operations*and allow the students to complete the questions independently.

### Supporting Students

- Allow less confident students to complete the review questions in a small group with the support of a teacher or teacher aide.

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