Multiplication of two numbers that differ by 2

Maths Tricks , short cut tricks for maths to make calculation easy and fast

Multiplication of two numbers that differ by 2 (This trick only works if you have memorised or can quickly calculate the squares of numbers. When two numbers differ by 2, their product is always the square of the number in between these numbers minus 1.Let me explain this rule by taking examples 18*20 = 19^2 - 1 = 361 - 1 = 360 25*27 = 26^2 - 1 = 676 - 1 = 675: Example.
Understand the rule by 1 more example 49*51 = 50^2 - 1 = 2500 - 1 = 2499; Is this maths trick helpful? (1260) (412) Post / Read comment (0)

Dimple

India

Punjab

Time: 00:01:33

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Six is a number perfect in itself, and not because God created the world in six days; rather the contrary is true. God created the world in six days because this number is perfect, and it would remain perfect, even if the work of the six days did not exis

Saint Augustine of Hippo

A man whose mind has gone astray should study mathematics.

Francis Bacon

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Multiplication of two numbers that differ by 2

Maths Tricks , short cut tricks for maths to make calculation easy and fast