The standard notation of 1000a + 100b + c is
abc
abc0
a0bc
ab0c
1000a + 100b + c can be written as 1000×a + 100×b + 10×0 + 1 × c = ab0c So, standard notation of (1000a + 100b + c ) is ab0c.
The digit at hundreds place in the number expressed by 1000a + 100b + 10c + d is ___