# Math Formulas, Practice, Tests, Forums, Free Help

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3D Shapes and Nets (Will Haining)

Expressing as a percentage (Will Haining)

Fractions Decimals and Percentages (Will Haining)

Volume Density and Mass (Will Haining)

Significant Figures (Will Haining)

Speed, Time and Distance (Will Haining)

Worksheet: Comparing Fractions

Worksheet: Least Common Multiple

Expressing as a percentage (Will Haining)

Fractions Decimals and Percentages (Will Haining)

Volume Density and Mass (Will Haining)

Significant Figures (Will Haining)

Speed, Time and Distance (Will Haining)

Worksheet: Comparing Fractions

Worksheet: Least Common Multiple

Fill in the following figure with seven natural numbers so that the sum of the three numbers in each row, column, and two diagonal lines equals 21.
it is "huanfang" in chinese

#### Website Info

The website was created in September 2005.

It is visited by 25,000 - 35,000 people daily, mostly from USA, Bulgaria, Russia, India, Philippines, Ukraine, Serbia...

In 2011 was created a Russian version, and in 2015 Serbian.

It is visited by 25,000 - 35,000 people daily, mostly from USA, Bulgaria, Russia, India, Philippines, Ukraine, Serbia...

In 2011 was created a Russian version, and in 2015 Serbian.