How to calculate the decimal number in the first grade mathematics, please answer in detail, thank you! (28 13:54: 18)
( 1) 1 10 10 1= 1*2^5+ 1*2^4+0*2^3+ 1*2^2+0*2^ 1+ 1*2^0=32+ 16+4+ 1=53;
The decimal number is 53.
(2) 1507= 1*8^3+5*8^2+0*8^ 1+7*8^0=5 12+320+7=839
The octal number is 839.
Just change 2 to 8 in the example.