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Q: How do you add 4 digit integers?

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18 positive integers and 36 integers (negative and positive)

Add the magnitudes of the integers (-4 has a magnitude of 4), then take the sign to the answer.

There are 4500 such numbers.

4

22 of them.

0

400/4= 100 and 800/4=200

Four random, positive, one-digit integers.

There are 10 one digit positive integers (0 - 9) and 9 one digit negative integers (-9 to -1) making 19 in all.

-4, -2, 0, and 2 are the four consecutive even integers. When you add them up they equal -4.

-23

from 1000 to 9999, ie 9999 - 999 = 9000

Add the last digit (units digit) to twice the previous digit (tens digit). If this sum is divisible by 4, so is the original number.

6

1 and 24 2 and 12 3 and 8 4 and 6

There is a clever but tricky way to solve this. If we have to find the number of 4-digit integers that contains at least one 5, we can also find the number of all the 4-digit integers and the number of integers that do not contain any 5's and subtract it from the first number. This is called complementary counting.So, first of all, we must find the number of 4-digit numbers there are. There are 9000 of them.Now, we find the number of 4-digit integers without 5's. By thinking a little bit, we see the first digit must be from 0~9 excluding 5. That is a total of 9 numbers. This is the same for the next three digits. Therefore, there are 94 = 6561 4-digit numbers without a 5.Finally, we can subtract. 9000 - 6561 = 2439

4 digits - representing 16 integers.

18

Positive integers are greater than negative integers. For positive integers: * The integer with more digits is larger. * If two integers have the same length, compare the first digit. If the first digit is the same, compare the second digit, then the third, etc., until you find a difference. In each case, the integer with the larger digit (at the first position where you find a difference) is the larger one.

Starting with the number just before the "decimal/binary" point and going left: you leave the first digit as it is, add 2 times the digit to its left, add 4 times the digit to its left, add 8 times the digit to its left, and so on to the end. The multiple is doubled each time. If you have digits to the right of the point, you add 1/2 times the first digit add 1/4 times the digit to its right, add 1/4 times the digit to its right, and so on to the end. The multiple is halved each time. The grand total is the equivalent decimal number.

8

All digit are significant except: leading zeros,in the case of integers, trailing zeros.All digit are significant except: leading zeros,in the case of integers, trailing zeros.All digit are significant except: leading zeros,in the case of integers, trailing zeros.All digit are significant except: leading zeros,in the case of integers, trailing zeros.

The answer would be 37.

4 + 5 = 9 -3 + 7 = 4 1 + -5 = -4 -2 + -4 = -6

There is no such ratio that applies for all single-digit and double-digit integers.