Method for multiplying numbers where the first figures add up 10 and the last figures are same

Method for multiplying numbers where t he first figures add up 10 and the last figures are same

44X64

Here first figures are 4 and 6 and their add up 10 and unit figures of both number are same Just multiplying the last figures 4x4=16 Put it at right hand side

Now we get required answer2816Similarly 36x76 , 6X6 =36 right hand side , (3x7)+6= 21+6=27 left hand side Required answer is 2736NOTE If multiplication of last figures is less than 10 add zero before unit digitEx 81x21 , 1x1=01,( 8x2)+1= 16+1=17 Required answer 1701

An Intersting Problem

A person started a poultry with 40 chickens and foodings for 5 weeks .But every week he sold 5 chickens so that he had some foodings left even after he had sold off all the chickens .What is the amount as a percentage of the original quantity?

Shortcut Method For fast Calculations

Method for multiplying numbers where the first figures are same and the last figures add to1 0
42 x 48 =

Both numbers here start with 4 and the last figures (2 and 8) add up to 10. just multiply 4 by 5 (the next number up) to get 20 for the first part of the answer.
And we multiply the last figures: 2 x 8 = 16 to get the last part of the answer