Lesson: One-step Equations: Addition and Subtraction Mathematics • Middle School • Grade 7 • Mathematics • Middle School • Grade 6

Ethan’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 Ethan’s mother gave him.

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

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.