We have learned many methods of multiplication, most of them used for special numbers, like duplex or near a base. But there is a method that works for all numbers. This is the vertical and crosswise method, to multiply any two numbers. First let us look at multiplication of two-digit numbers.
The specialty of this method is that we get the answer in a single step unlike the traditional method which takes three operations. The steps:
• First multiply the units digits vertically.
• Next multiply the digits crosswise and add the answers.
• Multiply the tens digits vertically.
Example: 12 x 32
Multiply the units digits vertically
Multiply cross wise and add
Step:3 Multiply the tens digits vertically
Answer: 384
67 x 23
Answer: 1541
43 x 56
Answer: 2408
Tricky triangle
Use the numbers 1,2,3,4,5,6 in the circles to get a total of 9 along all the three sides. You can also try to get a total of 10 along all the three sides.