No matter how hard you try, maybe giving up maths straight after leaving high school, you inevitably end up having to solve a bleeding problem some time.
Or you enjoy the simplistic logic of maths. Either way, these 10 easy tricks to solving a few harder problems will be of use to you.
The first trick is similar to the times 10 trick where you just add a zero to multiply anything by ten. This one is for multiplying by 11.
Take the original number and imagine a space between the two digits (in this example we will use 52: 5_2
Now add the two numbers together and put them in the middle: 5_(5+2)_2
That is it – you have the answer: 572.
10 Easy Arithmetic Tricks – [Listverse]
Sweet!
[...] 2, 2007 in VarieTags: divisione, lifehack, matematica, trick Segnalo questa interessante raccolta di 10 trucchi per risolvere velocemente alcuni noiosi calcoli. Alcuni sono [...]
Well, then try 55 or 66 or 77 for that great 11-rule.
5 +5= 10 simple get the sum of 1(from 10) and the 5 of the 1st digit,, result to 605….
hope u understand
Doesn’t work for numbers such as 48, however, where the two digits added together are greater than 9. Right?
in that case when the middle number goes into double figures, add it to the first number.
i.e. 49 x 11
4_(4+9)_9
which works out 4_(13)_9
so add the 4 and 13 = 53
and the 9 on the end = 539
Maths doesn’t use ‘simplistic’ logic. Simplistic doesn’t mean ‘simple’, it means ‘treating complex issues as simpler than they really are.’
Apart from that – nice tip, and thanks Jim for the advanced tip!
dry who like maths anyway
if for example I 895 x 11 or more digit numbers with how the trick is to multiply by 11?
895 x 11 =
8950
+895=
9845
cool others tricks
Amazing
IS there any other tricks to learn
Interesting
ihate math forever
its intresting
bro i dont get the first trick so forget about other so can plz help.
you know what math is fun if you know how to live it….math is vital in our life..