MathMultiverse

26. Negative Numbers

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

  Example : Spe…

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…

Circles and ellipses

Circles and Ellipses

24. Equivalent Fractions, Simplifying Fractions, Relations between Fractions

Equivalent Fractions

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

23. Fractions

Fraction is the part of whole.

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

22. Length & Weight

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

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…

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…

    Circles and ellipses

Circles and ellipses – colored

Star

Golden spiral

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…

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