 Lesson 13-2 Check Your Understanding ACTIVITY 13

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Lesson 13-2 Check Your Understanding ACTIVITY 13
```Lesson 13-2
ACTIVITY 13
continued
My Notes
6. Samantha has 27 pictures on her new tablet. How many more must
she take so she will have 81 pictures? Define a variable, write an
equation, and solve it algebraically. Check your solution.
7. Zander has 2 of a cup of milk. How much more milk does he need
3
1
to have 1 cups of milk? Define a variable, write an equation, and
2
solve it algebraically. Check your solution.
8. Write a real-world problem that could be represented by the
equation b + 36 = 52.
LESSON 13-2 PRACTICE
9. Lamont has read 152 pages of a 450-page book. How many more
pages does he have to read to finish the book? Define a variable,
write an equation, and solve it algebraically. Check your solution.
10. Make sense of problems. Tim can run a mile in 5.8 minutes.
Shannon can run a mile in 8.2 minutes. How much longer does it
take Shannon than Tim to run a mile? Define a variable, write an
equation, and solve it algebraically. Check your solution.
11. Write a real-world problem that could be represented by the
equation x + 15 = 94.
12. Write a note to a friend explaining how to solve an addition equation
using the balance scale method.
Activity 13 • Solving Addition and Subtraction Equations
165
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