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**decode EVERYTHING about fractions.**

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Fractions-DECODED!

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Fractions - Basics

Naming Fractions I

Naming Fractions II

Naming Mixed Numbers

Mixed Number to Fraction

Fraction to Mixed Number

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### Fraction as a Number

Fraction as a Number

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Simplify, Expand, Common Denominator

Expanding Fractions I

Expanding Fractions II

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Simplifying Fractions I

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Simplifying Fractions IV

Simplifying Fractions V

Prime Numbers

### Multiplying and Dividing

Multiplication and Division

Multiplying Fractions

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### Adding and Subtracting

Addition and Subtraction

Addition Fraction plus Whole Number

Adding Fractions

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### All together ...

LĂ¤ngere Bruchaufgaben

Fractions-DECODED!

Complex Calculator

Naming Fractions I

Naming Fractions II

Naming Mixed Numbers

Mixed Number to Fraction

Fraction to Mixed Number

Reciprocal

Expanding Fractions I

Expanding Fractions II

Expanding Fractions III

Is A divisible by B?

Simplifying Fractions I

Simplifying Fractions II

Simplifying Fractions III

Simplifying Fractions IV

Simplifying Fractions V

Prime Numbers

Multiplying Fractions

Dividing Fractions

Addition Fraction plus Whole Number

Adding Fractions

Adding Mixed Numbers

Whole Number minus Fraction

Subtracting Fractions

Subtracting Mixed Numbers

State - without calculating - whether the two given numbers are divisible?

A number can be divided by **2**, if the last digit is even: 0, 2, 4, 6, 8.

A number can be divided by **3**, if its cross sum is divisible by 3.

A number can be divided by **4**, if its last two digits are divisible by 4.

A number can be divided by **5**, if its last digit is 0 or 5.

A number can be divided by **6**, if its last digit is even AND its cross sum is divisible by 3.

A number can be divided by **8**, if its last three digits are divisible by 8.

A number can be divided by **9**, if its cross sum is divisible by 9.

A number can be divided by **10**, if its last digit is 0.

A number can be divided by **25**, if its last two digits are divisible by 25, i.e. 00, 25, 50 or 75.

A number can be divided by **100**, if its last two digits are equal to 0.

A number can be divided by **1000**, if its last three digits are equal to 0.

If you would like to have a vivid explanation with a detailed example, please read the page Simplifying/Reducing Fractions - Learn this magic trick!

**Step 1: In what case was a number divisible by 6?**

A number can be divided by **6**, if its last digit is even AND its cross sum is divisible by 3.

**Step 2: Test, if the number is divisible by 6**

The last digit of 42 is 2. 42 is therefore divisible by 2.

**Step 3: Test, if the number is divisible by 3**

The cross sum of 42 is: 4 + 2 = 6.

42 is divisible by 3 and therefore 42 is divisible by 6.