Mental Math – 5
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Introduction
Preview
Addition: Breaking Up Numbers
Round-and-Adjust" Strategy
Subtraction: Breaking Up Numbers
Subtraction: Rounding Numbers
5 lessons
Multiplication Basics
Multiplying 2-Digit Numbers by 11
Multiplying 3-Digit Numbers by 11
Multiplication: Breaking Up Numbers (Part 1)
Multiplication: Breaking Up Numbers (Part 2)
Multiplication: Breaking Up Numbers (Part 3)
5 lessons
Multiplication Advanced
Multiplication Magic
The "Twin Tens" Multiplication Trick
The "Twin Units" Multiplication Hack
Multiplication: Identical First Digits for 2-Digit Numbers
Multiplication: Identical First Digits, Sum of Last Digits Is 5
Multiplication: Multiplying 2-Digit Numbers by Hundreds
6 lessons
Division Basics
Division Strategy: Breaking Up Numbers
Finding Remainders When Dividing by 3
Division: Finding Remainders When Dividing by 4
3 lessons
Fractions Basics
Adding Fractions with 1 as the Numerator
Adding Fractions with the Same Numerator
Subtracting Fractions with 1 as the Numerator
3 lessons
Decimals Basics
Decimals: Multiplying by 10
✖️ Multiplying Decimals by 100
Multiplying 2-Digit Numbers by Decimals Ending in 0.9
Decimals: Multiplying 2-Digit Numbers by 1.1
Decimals: Breaking Up Numbers to Multiply
Decimals: Breaking Up Numbers Ending in 0 to Multiply
Decimals: Dividing by 10
Decimals: Dividing by 100
Decimals: Breaking Up Numbers to Divide
9 lessons
Squaring Basics
Squaring Numbers Ending with Zero
Squaring Even Numbers
Squaring Odd Numbers
Squaring Numbers Ending in 1
Squaring Numbers Ending with 2
Squaring Numbers Ending with 3
Squaring Numbers Beginning with 5
7 lessons
Multiplication Advanced
The “Twin Tens” Multiplication Trick
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