1, divisible fraction: suppose we have a fraction a/b and an integer c, and the calculation method of multiplying the fraction by the integer is: (a/b) × c = a× c/B. We multiply the fraction by the integer. For a more intuitive understanding, we can consider a practical example. For example, (2/3)×4, we can think of 2/3 as 2 divided by 3 and then multiplied by 4. The calculation result is: (2/3)×4=8/3.
2. Fraction multiplied by fraction: suppose we have two fractions a/b and C/D. The calculation method of the fraction multiplied by fraction is: (a/b)×(c/d)=(a×c)/(b×d). That is, the numerator times the numerator and the denominator times the denominator. For example, (2/3)×(3/4), we can regard 2/3 and 3/4 as 2 divided by 3 and 3 divided by 4 respectively, and then multiply them. The calculation result is: (2/3)×(3/4)= 1/2.
3. Fraction multiplied by decimal: Method 1: Convert the fraction into decimal, and then multiply the decimal by another number. Method 2: Multiply the fraction with the decimal, and then divide it into the simplest fraction. The known fraction is: 3/4, which is converted into decimal: 0.75. Another known number is: 0.5, multiplied by the decimal number to get: 0.375. So the result of multiplying the fraction by the decimal is 0.375.
Integer related content
1 and integer are special numbers in mathematics, which have specific properties and meanings in addition, subtraction, multiplication and division. Integer includes positive integer, 0 and negative integer, which has important application value in mathematics. A positive integer refers to an integer greater than 0, such as 1, 2, 3, … etc.
2. The number of positive integers is infinite, that is, there is no largest positive integer. Positive integers can be expressed as an ordered set of natural numbers, that is, natural numbers can be regarded as a part of positive integers. Positive integers are transitive, that is, if a>b and b>c, then a> C.0 is the most special number among integers. Add any number to 0 to get the original number, that is, a+0 = a, and multiply any number by 0 to get 0, that is, a×0=0.
3. Negative integers refer to integers less than 0, such as-1, -2, -3, … etc. Negative integers have the following properties: the number of negative integers is infinite, that is, there is no smallest negative integer. Negative integers and positive integers are in one-to-one correspondence, that is, every negative integer has a corresponding positive integer. The absolute value of a negative integer is equal to its reciprocal.