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
Tags:
Speed Maths