1, the definition of number multiplication refers to the process of taking the product of one number and another as the result. Specifically, given two real numbers A and B, we can multiply them and write them as a×b, that is, a×b=ab. For example, 2×3=2×3=62×3=2×3=6.
2. The property exchange law of number multiplication: number multiplication satisfies the exchange law, 2×3=3×2=62×3=3×2=6. Multiplication of the number of binding laws satisfies the binding law, (a×b)×c=a×(b×c). For example, (2× 3 )× 4 = 2× (3× 4) = 24 (2× 3 )× 4 = 2× (3× 4) = 24. Multiplication of zero Multiplies any number by 0, and the result is 0. For example, 2×0=02×0=0.
3. Rule of number multiplication: In the number multiplication operation, the position of radix is in the front, the position of index is in the back, and the middle is connected by an X symbol. For example, 3×43×4 represents the result of multiplying 3 by 4. Meaning of exponent: In the number multiplication operation, exponent can be expressed in superscript form, such as ab, which means the result of multiplying A by B times itself.
On the origin of mathematics
1, the origin of mathematics: the origin of mathematics can be traced back to prehistoric times. People began to realize the concept of quantity and learned to count simply. The earliest mathematical concepts can be traced back to the ancient Egyptians and Babylonians in 3000 BC. The ancient Egyptians invented a counting system based on 10, while the ancient Babylonians used a counting system based on 60.
2. Development of ancient mathematics: The development of ancient mathematics mainly occurred in several different civilizations. In ancient Greece, Pythagoras, Euclid, Archimedes and other mathematicians made great contributions to mathematics. Pythagoras put forward Pythagorean Theorem (Pythagorean Theorem), and Euclid wrote Elements of Geometry, which is one of the foundations of western mathematics.
3. Development of Middle Ages and Modern Mathematics: In the Middle Ages, European scholars began to re-examine ancient mathematics and made new progress. They translated and studied the mathematical works of ancient Greece, ancient India and ancient China, from which they learned many new ideas and methods. These ideas and methods provide an important foundation for the development of modern mathematics in Europe.