Categories
Multiplication Multiplying Numbers with last digit sum 1000 Speed Math

[Speed Math] MULTIPLYING NUMBERS WITH LAST DIGIT SUM 1000

Here’s an example of a SPEED MATH shortcut for MULTIPLYING NUMBERS WITH LAST DIGIT SUM 1000: (Mul) S1000dx from the MULTIPLICATION category.

Multiplying Numbers with last digit sum 1000

When can I use this method?

For multiplying any 4-digit number with another 4-digit number such that the sum of the last 3 digits of the multiplier and multiplicand = 1000 and the remaining digits of multiplier are same as that of the multiplicand.

For multiplying any 5-digit number with another 5-digit number such that the sum of the last 3 digits of the multiplier and multiplicand = 1000 and the remaining digits of multiplier are same as that of the multiplicand.

You cannot use this method to multiply numbers with unequal number of digits, i.e. multiplying a 4-digit number with a 5-digit number.

 

[contentblock id=google-adsense-post]

[starrater tpl=10]

[tubepress mode=”playlist” playlistValue=”PLngU_U4dGjQebf9zGUiPNA_7M7T3BOYC-“]

 

pdf Download Practice sheet for MULTIPLYING NUMBERS WITH LAST DIGIT SUM 1000

[contentblock id=google-adsense-post]

Notes –

  1. The RHS of the answer should always be written in 6-digit form by prefixing zero(s), if the value is less than 4-digit, e.g. write ‘9’ as ‘000009’ or ’21 as ‘000021’ or ‘121’ as ‘000121’ and so on…

Related Shortcuts –

Multiplying Numbers with last digit sum 10: (Mul) S10dx
Multiplying Numbers with last digit sum 100: (Mul) S100dx

 

[contentblock id=speedmath-blockquote]

Leave a Reply

Your email address will not be published. Required fields are marked *