1, multiplication formula is the basic content of mathematics education in ancient China, and it is the formula to help people memorize multiplication formula quickly. Multiplication formula includes 99 multiplication table and supplementary multiplication formula, among which 99 multiplication table is the most commonly used multiplication formula.
2.99 The multiplication table is a table that lists the multiplication results of numbers from 1 to 9, which is convenient for people to remember and calculate. For example, "two two get four" is 2×2=4, "three three get nine" is 3×3=9 and so on.
3. Besides the multiplication table of 1999, there are some supplementary multiplication formulas, such as "one for one", "two for four", "three for nine" and "four for sixteen". These formulas are also written according to the results of digital multiplication, which can help people better remember the multiplication formulas.
Skills of setting formulas
1, grasp the law: Formulas should be formulated according to the laws and characteristics of knowledge, grasp the key points, and summarize the contents that need to be memorized in concise language. For example, in the multiplication formula, each line is arranged in the order from big to small or from small to big, so the law of "head to head, tail to tail, tail to tail" can be summarized.
2. Contrastive memory: For some confusing numbers or concepts, you can write formulas in a contrasting way, such as "looking horizontally and vertically". Image memory: Formulas can be written in an intuitive way, such as using metaphors and image language to describe concepts or formulas, which makes the memory more profound.
Prosodic memory: the formula can rhyme, catchy and easy to remember. For example, "three, five, fifteen" can be written as "three, five, fifteen, stand behind your hands and take a bite. Count to three, fifteen". Decomposition memory: For some long formulas or formulas, you can write formulas by decomposition. For example, "head by head and tail division" can be decomposed into "head by head and tail division".