The divisors of 12 are 1, 2, 3, 4, 6, 12.
The divisor of 18: 1, 2, 3, 6, 9, 18, so the greatest common divisor of 12 and 18 is 6.
In the same way, finding the least common multiple is also studied by list method in primary school.
(2) junior high school to explore the problem of chickens and rabbits in the same cage. List method: 8 heads and 22 feet of chickens and rabbits.
Chicken head 2, 3, … chicken leg 4, 6, …
Rabbit head 6, 5, ... Rabbit legs 24, 20, ...
(3) When drawing a quadratic function image, use a list and trace points. The abscissa corresponds to the ordinate.
(d) The frequency distribution histogram of junior high school statistics is used in the list.
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