13 results for “multiplication”
Multiply numerators and denominators straight across.
Two equal ratios; solve using cross multiplication.
Probability of both independent events occurring.
Multiply every entry of a matrix by a scalar.
The identity matrix leaves any matrix unchanged under multiplication.
A Vedic sutra for multiplying numbers close to a base (10, 100, 1000, etc.). Works by finding how far each number is from the base.
A general Vedic multiplication method that works for any two numbers. Uses vertical and crosswise multiplication patterns.
Split large multiplications into simpler parts using the distributive property.
A quick way to verify multiplication and addition results by checking digit sums modulo 9.
Multiplying any number by a string of nines is instant: subtract 1 from the number for the left part, then take the complement for the right part.
When numbers are near a convenient working base that is a multiple of a power of 10, use a proportional base to simplify the multiplication.
When one factor is even, halve it and double the other to reach an easier multiplication.
For numbers a little above 100, use the surplus from 100 to multiply almost instantly.