This video demonstrates, without narration, a trick to multiplying large numbers. To do the trick, just draw a diagonal line for every unit in the number and add up the number of times the lines cross.
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Use ">" (greater than) and "<" (less than) symbols
How To:
Find the slope of a line given 2 points with fractions
How To:
Subtract a mixed number from a proper fraction in basic math
How To:
Multiply & Divide Numbers (Basic Elementary Math)
How To:
Find the area of an oblique triangle using formulas
How To:
Find a number given Its percent
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Find the horizontal asymptotes of rational functions
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Find the slope from a set of points
How To:
Find the area & perimeter of triangles & squares
How To:
Find extra points for a parabola (quadractic equation)
How To:
Find the Slope Given 2 Ordered Pairs
How To:
Write a sum/difference of logarithms as a logarithm
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Determine if you have a function
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Find and sketch the domain of a multivariable function
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Evaluate logarithms using a calculator TI-83
How To:
Divide small numbers by big numbers
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Find the perimeter & area of a complex figure
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Find the surface area of a cone without slant height
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Calculate Faster Than a Calculator
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2 Comments
thats all fine and well if you multiply equal ammounts of numbers. now what if they are different, say 569 x 73? it doesnt form the same type of grid and i am lost as to which crossing places you add up.
dont get weird
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