MathMultiverse

The World of Numbers

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26. Negative Numbers

Negative Numbers are numbers less than 0. They represent amount of loss or absence.

  Example : Spe…

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25. Operations with Fractions

Addition and Subtraction

1. If denominators equal, then add or subtract numerators.

latex a \pm \frac{b}{c} = \frac{ac \pm b}{b} \; \; $ a = (a·c)/c, so a + b/c = (ac + b)/c.

Examples :

3 + 2/5 = (3·5 + 2)/5 = 17/5

6 – 5/7 = (6·7 – 5)/7 = 37/7

Mixed…

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Circles and ellipses

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Circles and Ellipses

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24. Equivalent Fractions, Simplifying Fractions, Relations between Fractions

Equivalent Fractions

Take two equal circles. Cut one into three pieces, other into six pieces. The…

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23. Fractions

Fraction is the part of whole.

If you cut paper into four equal pieces, every piece would be one…

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22. Length & Weight

Length is the measurement of distance between two points.For example, distance between home and…

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Time & Time units

A Day is the period of the earth’s revolution on its axis. One day is approximately equal to 24 hours.

1 day = 24 hours (There are 24 hours in day.)

1 hour = 60 minutes (There are 60 minutes in minute.)

1 minute = 60 seconds (There are 60 seconds in…

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20. GCF & LCM

GCF(60, 45) = ?

Firstly, show numbers as exponents of prime factors. Then underline common prime factors.

60 = 22 ×3× 5

45 = 32 × 5

Then find product of common prime factors with lowest exponents.

GCF(60, 45) = 3 × 5 = 15.

LCM(60, 45) = ?

Firstly, show…

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Gallery

    Circles and ellipses

Circles and ellipses – colored

Star

Golden spiral

  Star

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19. Common Multiplies, Lowest Common Multiply

Common Multiplies are numbers which can be divided by two or more numbers.

Common multiplies of 3 and 4 are 12, 42, 36, and etc.

Multiplies of 4 are 4, 8, 12, 16, 20, 24, …….

Multiplies of 3 are 3, 6, 9, 12, 15, 18, 21, 24, …….

Lowest Common Multiply of…

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TANGRAM http://wp.me/s3hMC4-tangram

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Prime and Composite Numbers between 1 and 100

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numbers 1 to ten to the power of 1 to 10th

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cube and cube roots of numbers from 1 to 100.

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