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