Lesson: One-step Equations: Addition and Subtraction Mathematics • 6th Grade

In this lesson, we will learn how to write and solve one-step addition and subtraction equations in questions including word problems.

Lesson Plan

Students will be able to

deduce the additive property of equality, which states that if the same amount is added to each side of an equation, the equality is still true,
deduce the subtraction property of equality, which states that if the same amount is subtracted from each side of an equation, the equality is still true,
know that solving a one-step equation means finding the unknown value to make the statement true.

Lesson Video

Lesson Playlist

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01:56
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01:15

Lesson Worksheet

Q1:

James’s mother gave him coloring pencils for his birthday. He lost 43 of them at the park. If he has 40 left, write and solve an equation to find how many coloring pencils James’s mother gave him.

Q2:

Over a week, Hannah practiced on her flute for 5 hours. This was 3 hours longer than she had practiced the previous week. First, write an equation for the number of hours () that she spent practicing the previous week, and then solve it.

Q3:

Natalie has 12 cows on her farm, which is 5 cows fewer than her neighbor’s farm. Write a subtraction equation to determine the number of cows that her neighbor has, , and then solve it.