1, ten times ten:

Formula: head joint, tail to tail, tail to tail.

2. The heads are the same and the tails are complementary (the sum of the tails is equal to 10)

Formula: After a head is added with 1, the head is multiplied by the head and the tail is multiplied by the tail.

3. The first multiplier is complementary

Another multiplier has the same number.

Formula: After a head is added with 1, the head is multiplied by the head and the tail is multiplied by the tail.

4, dozens of eleven times dozens of eleven.

Formula: head joint, head joint, tail to tail.

5, 1 1 times any number.

Formula: head and tail do not move down, middle and pull down.

The main functions of the historical harvest speed algorithm are as follows:

1, from high position, from left to right;

2. There is no calculation tool;

3. There is no calculation program;

4. See that the formula directly quotes the correct answer;

5. It can be used for addition, subtraction, multiplication and division of multi-bit data, as well as mathematical operations such as multiplication, square root, trigonometric function and logarithm.