The math method of multiplying the head and tail by the tail is a very practical quick calculation technique, especially when two two-digit numbers are multiplied. This method not only simplifies the calculation process, but also increases the speed of calculation, which is ideal for quick problem solving in daily life.
When we encounter the multiplication of two two-digit numbers, we can use the head-by-head and tail-by-tail method to simplify the calculation. The specific steps are as follows:
First, we multiply the head (ten digits) and tail (single digits) of two two-digit numbers, multiply the tail and tail, and the result obtained is the head and tail of the new number, and then multiply the head and tail respectively, and the result is dislocated and added, so that we get two new numbers.
Here's an example of how to do this: Let's say we want to multiply 36 by 47. First, we multiply heads (3) and heads (4) respectively to get 12; Multiply the tail (6) and tail (7) to get 42, listing 1243. Then, we multiply the tail (6) and the head (4) to get 24 and put them under the 24 of 1243 to dislocate and add them together to get 1483. Then multiply the head (3) by the tail (7) to get 21, and then put it under the 48 of 1483 and add it to get 1694
The math method of multiplying the head and tail is not only easy to learn, but also very practical. It can help us quickly and accurately calculate the result of multiplying two two-digit numbers, improving our computing power and efficiency. Mastering this method, we will be able to solve math problems more easily in our daily lives.