Ms. Amrhein
Ms. Amrhein4th Grade Math Class
Looking ForwardDay 1Triangle Problem Day 2Value of UnknownDay 3Commutative Problem
Triangle Problem 1. Breakdown
2. All Prime Numbers
3. Guess and Check 20 10 2 5 X 2 X 2 = 20Day 1
Triangle Problems 16 24
8 2 2 4 2 2 2 2 24 6 2 2 3 2
BY YOURSELF!!1) 15 2) 32 3) 205 3 8 4 2 24 2 2 2 2 2 22 10 2 2 5
Day 2 Find the Value How many more M&Ms do you need to have 11 M&Ms.
5 + b = 11
-5 -5b = 65 + 6 = 11
Yes billy?..6! Good job! Thats right!....In terms of an equation. We start with 5 m&ms and trying to figure out what the other number we need in order to have 11 m&ms. 6
Find the Value(Addition)
7 + a = 9-7 -7 a = 2
7 + 2 = 9
Equation
2. Subtract from both sides
3. Value
Find the Value(Subtraction)
1. Equation
2. Add number
3. Valueb - 3 = 10 + 3 + 3 b = 13
BY YOURSELF!!1) m 6 = 0 2) 10 + f = 30 3) z 4 = 7 +6 +6 m = 6 10 - 10
f = 20 + 4 +4
z = 11
Checkpoint!!!
12 2) 7 + b = 10 3) w - 6 = 13
3 4 3 2 2-7 -7
b = 3 +6 +6
w = 19
Day 3Commutative Problem!!
Commutative Problem
Example:
t + s = s + t
*Notice the same units
Guess which one?!
13 = 6 + 3 + 49 + 2 = 2 + 9(7 + 2) + 4 = 7 + (4 + 2)
Which problem shows the commutative property?
ANSWER!!!!!!!!
13 = 6 + 3 + 4
No!(7 + 2) + 4 = 7 + (4 + 2)No!9 + 2 = 2 + 9Yes!!!
Overall Review 1) 14 2) b + 3 = 4 3) Commutative Problem7 2 -3 -3b = 1
* Extra Credit *1) 100 2) 20 + j = 55 10 -20 -20
5 2 2 5 j = 35