【题目】How many differen tthree-digit numbers can b e formed with th e digits 1 ,2 and 3 if each d igi tcan only b e used onc e in each number?How many differen tthree-digit numbers can b e formed with th e digit
18. How many odd 3-digit numbers have the property that their digits, read left to right, are in strictly increasing order? 相关知识点: 试题来源: 解析 解:符合要求的三位数的十位数字只能是2~8,下面进行分类计数。 (1)口2口的有1 ×4=4(个); (2)口3口的有2 ×3=6(个); (3)口4口...
3 is the divisor 6 is the quotient (the answer!) Let's try two example problems to learn how to divide multi-digit numbers using the standard algorithm. The first example will result in no remainder, while the second will be an example with a remainder. Example of Dividing Multi-Di...
Place value notation is essential to mathematics learning. This study examined young children's (4- to 6-year-olds, N = 172) understanding of place value prior to explicit schooling by asking them write spoken numbers (e.g., "six hundred and forty-two"). Children's attempts often ...
How to divide decimal numbers?Question:How to divide decimal numbers?Decimal Number:In mathematics, the decimal number can be defined as the type of number that is the combination of a whole number part and fractional part these parts differentiate by a point. The point is known as the decima...
If the middle digit is the average of the first and last digits, twice the middle digit must be equal to the sum of the first and last digits. Doing some casework: If the middle digit is , possible numbers range from to . So there are numbers in this case. If the middle digit is...
【题目】Answer the following questions:How many three-digit numbers can be made u sing the digits 0,1,2,3,4, and 5? How ma ny four-digit numbers can be made without re peating digits?How many five-digit numbers can be made us ing the digits 0,1,2,3,4,5,and 6 without ...
How many 3-digit numbers are formed by the digits 2,3,5,6,7 and 9, such as to be divided by 5 and having no digit repeat?Fundamental Theorem of Multiplication:The fundamental theorem of multiplication is important in calculating the nu...
3 digit numbers that can be formed using the digits from 1 to 9. Required number of 3-digit numbers = arranging 3 digits with the total number of 9 digits. = 9P3 = 9×8×7. C is the correct answer.
To find how many three-digit numbers are divisible by 87, we will follow these steps:Step 1: Identify the smallest three-digit number divisible by 87 The smallest three-digit number is 100. To find the smallest three-digit numb