1. Day 1
Scholars will be able to identify the missing
addend when two numbers add to one number.
Ex. _ +2 = 9
Standard: AF 1.1 * Use the commutative
and associative rules to simplify mental
calculations and to check results.

2. Questions to think about?
Why is important to have the same value
in each side?
Is the value of each side always the same
even if the numbers are different?
How is an equation similar to a balance?
How can I find the missing number?

3. Watch Me!
8
5 + 3 = ____
Think-Pair-Share: What does equals
mean?

4. Watch Me!
5
5 + ___ =10

5. Help Me!
9 = 7+ ___
What does equals mean?

6. Help Me!
3 + ___ =8
What is the missing number?

7. Think-Pair-Share
6 = 2+ ___
What is the missing number?

8. You try it!
4 + ___ = 11

9. Day 1 Name ___________________
A.F 1.1 Quick Quiz Date ____________________
2 + ___ = 7 5 + ___ = 9
What is the missing number? What is the missing number?
Challenge
6 = 1 + ____ 2 + ___ = 11
What is the missing number? What is the missing number?

10. Day 2
Scholars will be able to find the missing number
in a number sentence
(ex- 2 + ____ = 7 + 3)
Standard: AF 1.1 * Use the commutative
and associative rules to simplify mental
calculations and to check results.

11. Questions to think about?
Why is important to have the same
sum on both side of an equation?
How do we find the missing
number?

12. Watch Me!
4 + ___ = 12

13. Watch Me!
4+
M
=3+6 M M
M M M
M M M
M
M
M
M
What is the missing number?

14. Help Me!
5+6=3+
What is the missing number?

15. Think-Pair-
3+
Share
=7+4
How do we find the missing
number?

16. You try it!
9+1=5+

17. Closing
Why is important to have the
same sum on both side of an
equation?

18. Day 2 Name ___________________
A.F 1.1 Quick Quiz Date ____________________
3+6=5+
7+ = 4+5
What is the missing number? What is the missing number?
Challenge
4+4 = +3 8+8=7+
What is the missing number? What is the missing number?
Why?

19. Day 3
Scholars will be able to find the missing number
in a number sentence
(ex- 2 + ____ = 7 + 3 + 2)
Standard: AF 1.1 * Use the commutative
and associative rules to simplify mental
calculations and to check results.

20. Questions to think about?
Why is important to have the same
sum on both side of an equation?
How do we find the missing
number?

21. Watch Me!
1+ =2+3+3
I need to have the same
number of as the other side.
So I count up.
8

22. Help Me!
9 + 1 +3 = 5 +
What is the missing number?

23. Think-Pair-
Share = 1
3+ +5+3
What is the missing number?

24. You try it!
2+5+1=1+
How do we find the missing

25. Closing
Don’t get tricked! Remember
that it is important to have the
same sum on both sides of an
equal sign!

26. Day 3 Name ___________________
A.F 1.1 Quick Quiz Date ____________________
1+3+3=5+
7+ = 4+2+3
What is the missing number? What is the missing number?
Challenge
2+3+4 = +3 5+ 5 + 8 = 8 +
What is the missing number? What is the missing number?
Why?

27. Day 4
Scholars will be able to find the missing number
in a number sentence
(ex- 2 + ____ = 7 + 3 + 2)
Standard: AF 1.1 * Use the commutative
and associative rules to simplify mental
calculations and to check results.

28. Questions to think about?
Why is important to have the same
sum on both side of an equation?
How do we find the missing
number?

29. Watch Me!
3+ =4+5+1

30. Help Me!
6 + 2 +2 = 7 +
What is the missing number?

31. Think-Pair-
Share = 3
4+ +5+3
What is the missing number?

32. You try it!
6+2+1=4+
How do we find the missing

33. Closing
How can a 2nd grader get tricked
when finding the missing
number?

34. Day 4 Name ___________________
A.F 1.1 Quick Quiz Date ____________________
2+4+1=3+
5+ = 1+5+3
What is the missing number? What is the missing number?
Challenge
2+1+4 = +5 4+3+5= 7+
What is the missing number? What is the missing number?
Why?