Lesson 13-2 Check Your Understanding ACTIVITY 13

Lesson 13-2
Solving Addition Equations
ACTIVITY 13
continued
My Notes
Check Your Understanding
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
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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
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