1. Solve using mental math.
1. x + 2 = 17
3. x – 7 = 3
ANSWER 15
ANSWER 10 2. x 6
= 4 4.
9x = 54
ANSWER 24
ANSWER 6

2. Most Missed on Test
Solve using mental math. 1. 3.
ANSWER
ANSWER 31 4. 2.
ANSWER
ANSWER
-49

5. 2 operations that undo each other,
such as addition and subtraction
Equations that have the same solution

6. equivalent equation b a b a
equivalent
equation b a b a

7. Party or War? -3 -3
y = 7 7 7 7 10

8. b = 29
a = 11
x = -5
y = -2

9. How can we “undo” division?60 60 60 12

10. x = 13
b = 52
x = -6
m = -56

12. 3 7 7 3

13. Which operation
do we do first? -7 -7 4 4 4 12 4

14. r = 28
k = 8 7a 7a 7 7 7 9 9

15. z = 4
b = 3

20. 10.

21. 12.

22. 14.

23. 16.

24. 18.

25. 20.

26. 22.

27. 24.

28. 26.