Addition 
Subtraction 
Multiplication 
Division 
Fractions 
Decimals & Percents 
Calculator Achievement 
Life-Skills Math Power 
Algebra 1 
Algebra 2 
Geometry 
Trigonometry 
Subtraction- Index
Subtraction
Unit 1: Subtraction and Place Numbers
Lessons
- Introduction to Subtraction and Place Numbers
- 6 Flash Cards
- 7 Subtraction Facts
- 8 Subtracting Items
- 9 Subtracting One-Place Numbers
- 10 Problem-Solving
- 11 Problem-Solving
- 12 Subtracting One-Place Numbers
- 13 Subtracting One-Place Numbers
Problems
- 8 Subtracting Items
- 9 Subtracting One-Place Numbers
- 10 Problem-Solving
- 11 Problem-Solving
- 12 Subtracting One-Place Numbers
- 13 Review: Subtracting One-Place Numbers
Tests
- 14 Test 1
- 15 Additional Help
- 16 Double-Check Test 1
- 87 Triple-Check Additional Help
- 88 Triple-Check Test 1
On Location
Unit 2: Subtracting One to Four-Place Numbers
Lessons
- Introduction to Subtracting One to Four-Place Numbers
- 17 Subtracting Two-Place Numbers
- 18 Checking Answers
- 20 Find the Missing Number
- 21 Problem-Solving-Phrases Used in Subtraction
- 22 Problem-Solving
- 23 Subtracting Three and Four-Place Numbers
- 24 Subtracting One to Four-Place Numbers
- 26 Problem-Solving
Problems
- 17 Subtracting Two-Place Numbers
- 18 Checking Answers
- 19 Checking Subtraction Problems
- 20 Find the Missing Number
- 21 Problem-Solving-Phrases Used in Subtraction
- 22 Problem-Solving
- 23 Subtracting Three and Four-Place Numbers
- 24 Subtracting One to Four-Place Numbers
- 25 Subtracting One to Four-Place Numbers
- 26 Problem-Solving
Tests
- 27 Test 2
- 28 Additional Help
- 29 Double-Check Test 2
- 89 Triple-Check Additional Help
- 90 Triple-Check Test 2
On Location
- Introduction to Subtracting One to Four-Place Numbers
- 17 Subtracting Two-Place Numbers (1 of 2)
- 17 Subtracting Two-Place Numbers (2 of 2)
- 18 Checking Answers (1 of 2)
- 18 Checking Answers (2 of 2)
- 20 Find the Missing Number
- 21 Problem-Solving-Phrases Used in Subtraction
- 22 Problem-Solving (1 of 2)
- 22 Problem-Solving (2 of 2)
- 23 Subtracting Three and Four-Place Numbers
- 24 Subtracting One to Four-Place Numbers
- 26 Problem-Solving
Unit 3: Borrowing to Subtract
Lessons
- Introduction to Borrowing to Subtract
- 30 Understanding Numbers
- 31 Understanding Numbers
- 32 Borrowing to Subtract
- 33 Borrowing to Subtract
- 34 Borrowing to Subtract
- 35 Problem-Solving
- 36 Review: Borrowing to Subtract
Problems
- 31 Understanding Numbers
- 33 Borrowing to Subtract
- 34 Borrowing to Subtract
- 35 Problem-Solving
- 36 Review: Borrowing to Subtract
Tests
- 37 Test 3
- 38 Additional Help
- 39 Double-Check Test 3
- 91 Triple-Check Additional Help
- 92 Triple-Check Test 3
On Location
Unit 4: Borrowing More Than Once
Lessons
- Introduction to Borrowing More Than Once
- 40 Deciding When to Borrow
- 41 Problem-Solving
- 42 Borrowing With Three-Place Numbers
- 43 Deciding When to Borrow With Larger Numbers
- 44 Problem-Solving
- 45 Borrowing More Than Once
- 46 Practice Borrowing
- 47 Practice Borrowing
- 48 Problem-Solving
Problems
- 40 Deciding When to Borrow
- 41 Problem-Solving
- 42 Borrowing With Three-Place Numbers
- 43 Deciding When to Borrow With Larger Numbers
- 44 Problem-Solving
- 45 Borrowing More Than Once
- 46 Practice Borrowing
- 47 Practice Borrowing
- 48 Problem-Solving
Tests
- 49 Test 4
- 50 Additional Help
- 51 Double-Check Test 4
- 93 Triple-Check Additional Help
- 94 Triple-Check Test 4
On Location
- Introduction to Borrowing More Than Once
- 40 Deciding When to Borrow
- 41 Problem-Solving
- 42 Borrowing With Three-Place Numbers (1 of 2)
- 42 Borrowing With Three-Place Numbers (2 of 2)
- 43 Deciding When to Borrow With Larger Numbers
- 44 Problem-Solving (1 of 2)
- 44 Problem-Solving (2 of 2)
- 45 Borrowing More Than Once
- 46 Practice Borrowing
- 47 Practice Borrowing
- 48 Problem-Solving
Unit 5: Borrowing From Zeros
Lessons
- Introduction to Borrowing From Zeros
- 52 Borrowing From One Zero
- 54 Problem-Solving
- 55 Borrowing From Two Zeros
- 56 Borrowing From One and Two Zeros
- 57 Problem-Solving
- 58 Borrowing From Larger Numbers
- 59 Problem-Solving
- 60 Borrowing From Separated Zeros
- 61 Problem-Solving
- 62 Review: Subtracting From Zeros
Problems
- 52 Borrowing From One Zero
- 53 Borrowing From One Zero
- 54 Problem-Solving
- 55 Borrowing From Two Zeros
- 56 Borrowing From One and Two Zeros
- 57 Problem-Solving
- 58 Borrowing From Larger Numbers
- 59 Problem-Solving
- 60 Borrowing From Separated Zeros
- 61 Problem-Solving
- 62 Review: Subtracting From Zeros
Tests
- 63 Test 5
- 64 Additional Help
- 65 Double-Check Test 5
- 95 Triple-Check Additional Help
- 96 Triple-Check Test 5
On Location
Unit 6: Problem-Solving
Lessons
- Introduction to Problem-Solving
- 66 Subtracting Money
- 67 Problem-Solving
- 68 Problem-Solving-Subtraction/Additional Information
- 69 Problem-Solving
- 70 Problem-Solving-Subtraction and Addition
- 71 Problem-Solving-Thinking Math
- 72 Problem-Solving-Thinking Math
- 73 Measurements-Subtraction and Addition
- 74 Picture Problems
- 75 Check-Writing
- 76 Check-Writing
- 77 Check-Writing
- 78 Bank Deposits and Check-Writing
- 80 Comparing Prices
Problems
- 66 Subtracting Money
- 67 Problem-Solving
- 68 Problem-Solving-Subtraction/Additional Information
- 69 Problem-Solving
- 70 Problem-Solving-Subtraction and Addition
- 71 Problem-Solving-Thinking Math
- 72 Problem-Solving-Thinking Math
- 73 Measurements-Subtraction and Addition
- 74 Picture Problems
- 75 Check-Writing
- 76 Check-Writing
- 77 Check-Writing
- 78 Bank Deposits and Check-Writing
- 79 Checking Accounts
- 80 Comparing Prices
Tests
- 81 - 82 Final Examination
- 83 - 84 Additional Help: Final Examination
- 85 - 86 Double-Check Final Examination
- 97 - 98 Triple-Check Additional Help: Final Examination
- 99 - 100 Triple-Check Final Examination
- 101 - 102 Assessment: Subtraction Book 2
On Location
- Introduction to Problem-Solving
- 66 Subtracting Money (1 of 2)
- 66 Subtracting Money (2 of 2)
- 67 Problem-Solving
- 68 Problem-Solving-Subtraction/AdditionaI Information
- 69 Problem-Solving
- 70 Problem-Solving-Subtraction and Addition
- 71 Problem-Solving-Thinking Math
- 72 Problem-Solving-Thinking Math
- 73 Measurements-Subtraction and Addition
- 74 Picture Problems
- 76 Check-Writing
- 78 Bank Deposits and Check-Writing
- 80 Comparing Prices
- Lessons
- Problems
- Tests
- On Location
- Lessons
- Problems
- Tests
- On Location
Menu
Placement TestUnit 1
Subtraction and Place Numbers
Unit 2
Subtracting One to Four-Place Numbers
Unit 3
Borrowing to Subtract
Unit 4
Borrowing More Than Once
Unit 5
Borrowing From Zeros
Unit 6
Problem-Solving
Unit 3: Borrowing to Subtract
- Introduction to Borrowing to Subtract01:25
- 31Understanding Numbers01:42
- 33Borrowing to Subtract02:05
- 34Borrowing to Subtract01:57
- 35Problem-Solving02:33
- 36Borrowing to Subtract02:29