# 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:**R**ead the word problem and underline information needed to solve problem**D**raw a picture to represent the problem**W**rite a number sentence to represent your drawing**W**rite an explanation of your answer to check

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

Using place value to add

Lesson 12: Using rounding to check for the reasonableness of your sum

Using rounding to check answers

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

Using rounding to check addition

Lesson 18: Using rounding to check for reasonableness of subtraction word problem

Using rounding to check subtraction

Lesson 19: Solve addition word problems using a variable

Using variables in addition

Lesson 19: Solve subtraction word problems using a variable

Using variables in subtraction