Students learn how to use non-calculator methods to solve addition and subtraction problems involving standard form. As learning progresses students consider negative powers of ten as well as positive.

At the start of the lesson students arrange a series or numbers in ordinary and standard form into ascending order. The plenary challenges students to apply their learning to solve a real life problem involving the land mass of the seven continents.

**Differentiated Learning Objectives**

- All students should be able to use the column method to add numbers written in the form A × 10
^{n}where n is greater than 1. - Most students should be able use the column method to add numbers written in the form A × 10
^{n}where n is an integer. - Some students should be able to use non-calculator methods to solve addition and subtraction problems involving standard form.

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