On rational numbers and absolute values If Ia + 3I + ib-5i = 0, then a = (), B = () Who would,

A:
|a+3|>=0,|b-5|>=0
Add the two formulas
|a+3|+|b-5|>=0
Known condition: | a + 3 | + | B-5 | = 0
So: | a + 3 | = 0, | B-5 | = 0
The solution is: a = - 3, B = 5
If Ia + 3I + ib-5i = 0, then a = (- 3), B = (5)

Is there a number whose absolute value is negative?

No
Absolute values are all nonnegative

Write the natural number n on the right side of each natural number (for example, write 2 on the right side of 35 to get 352). If the new number can be divided by N, then n is called "magic number". In the natural number less than 130, the number of magic numbers is______ ．

Let magic number be K digits, p be a natural number, PN = P × 10K + N, and N divide PN, then n divide 10K, when k = 1, n = 1, 2, 5; when k = 2, n = 10, 20, 25, 50; when k = 3, n = 100125

Write the natural number n on the right of any natural number. If the new number can be divided by N, it is called "magic number". All magic numbers less than 2012
The number has____ One

When the magic number m is
① 1 digit
M is the one digit factor of 10: 1, 2, 5
② 2-digit
M is the double-digit factor of 100: 10, 20, 25, 50
③ 3-digit
M is the three digit factor of 1000: 100, 125, 200, 250, 500
④ Four digit time
M is the four digit factor of 10000 (and less than 2012): 1000, 1250, 2000
To sum up, there are 15 magic numbers that meet the conditions

On rational numbers and absolute values If Ia + 3I + ib-5i = 0, then a = (), B = () Who would,