Speed Maths : Mutiplication Tricks



Multiplication :

Trick - 1

1.    12 x 32 = 12 x (30+2) = (12 x 30) + (12 x 2) = 360 + 24 = 384

2.    11 x 12 = 11 x (10+2) = (11 x 10) + (11 x 2) = 110 + 22 = 132

3.    14 x 19 = 14 x (20-1) = (14 x 20) – (14 x 1) = 280 – 14 = 266

4.     17 x 27 = 17 x (30-3) = (17 x 30) – (17 x 3) = 510 – 51 = 459

 

Trick - 2

Multiplication with 11 :

Example - 1  : 11 x 34 = ?

1)    11 x 34 = 1 x 4 = 4

2)    11 x 34 = 3 + 4 = 7

3)    11 x 34 = 3 ? 4

a.     3 (7) 4

b.    374

Example – 2 : 11 x 79 = ?

1)    11 x 79 = 1 x 9 = 9

2)    11 x 79 = 7+9 = 16

3)    11 x 79 = 7 ? 9

a)    7 (16) 9

b)    (7+1) 6 9

c)     869


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