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Some confusion as to whether it is "I" or "you". The number in question is 8642
tenth thousand
There are 9 digits that can be the first digit (1-9); for each of these there is 1 digit that can be the second digit (6); for each of these there are 10 digits that can be the third digit (0-9); for each of these there are 10 digits that can be the fourth digit (0-9). → number of numbers is 9 × 1 × 10 × 10 = 900 such numbers.
98642
To multiply two digit numbers, multiply each place value of a factor by each place value digit and add the results.
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. If it does not contain a fractional part then the decimal representation does not require a decimal point.
the place of each digit help the value of the number by using your multuplication
partial products
As 789: exactly as in the question. The decimal notation simply means that the place value of each digit is ten times that of the digit to its right.As 789: exactly as in the question. The decimal notation simply means that the place value of each digit is ten times that of the digit to its right.As 789: exactly as in the question. The decimal notation simply means that the place value of each digit is ten times that of the digit to its right.As 789: exactly as in the question. The decimal notation simply means that the place value of each digit is ten times that of the digit to its right.
sum
Assuming that 2356 is a different number to 2365, then: 1st digit can be one of four digits (2356) For each of these 4 first digits, there are 3 of those digits, plus the zero, meaning 4 possible digits for the 2nd digit For each of those first two digits, there is a choice of 3 digits for the 3rd digit For each of those first 3 digits, there is a choice of 2 digits for the 4tj digit. Thus there are 4 x 4 x 3 x 2 = 96 different possible 4 digit numbers that do not stat with 0 FM the digits 02356.
These numbers are selections from the numbers from 100 to 999. That's 9 choices for the first digit. Each time, the second digit has 9 choices (0 to 9 excluding the hundreds digit), and then the last digit has 8 choices. Total is then 9x9x8 = 648