# Math Common Core Videos - Grade 4

Numbers Base Ten Background Review

Using Base Ten Blocks to understand the value of a digit:

Place Value with Base Ten Blocks
Using Place Value Disks to understand the value of a digit:

Place Value with Place Value Disks and Base Ten Blocks

Word Problems using a Bar Model and the RDWW strategy we use in class:
Read the word problem and underline information needed to solve problem
Draw a picture to represent the problem
Write a number sentence to represent your drawing

Word Problems using a Bar Diagram and RDWW

MODULE 1

Word Problems using a Bar Diagram and RDWW
Lessons 1 and 2:  Each place on a Place Value Chart is 10 times larger than the place to the right
The value of a place in digit
Lessons 1 and 2:  Each place on a Place Value Chart is 10 times smaller than the place to the left.
The value of a place in digit
Lesson 3: Write numbers in word form and standard for with the help of commas
Using commas to write numbers
Lesson 4:  Using place value to write numbers in expanded form
Expanded Form
Lesson 5: Using <, >, = symbols and place value to compare digits
Comparing digits with place value
Lesson 6: Finding, 1, 10 or 100 thousand more or less than a given digit
Number Patterns
Lesson 7:  Use a number line model to round
Rounding with a Number Line
Lessons 8 and 9:  Using anumber line to round to a specific place.  Remember - number lines can be drawn horizontally and vertically.
Rounding to a specific place with a number line
Lesson 10:  Rounding with real world problems
Rounding in real life
Lesson 11: Using place value to understand the addition algorithm
Lesson 12:  Using rounding to check for the reasonableness of your sum
Lesson 13:  Using place value to understand the subtraction algorithm
Using place value to subtract
Lesson 14 and 15: Using the bar diagram to subtract
Using the bar diagram to subtract
Lesson 16:  Solve two step real world word problems with bar diagram (tape diagram)
Using the bar diagram in two step subtraction problems
Lesson 17: Using a bar model to solve a comparison word problem
Using a tape diagram (bar model) to solve a comparitive word problem
Lesson 18:  Using rounding to check for reasonableness of addition word problem