11011 - 101 = 10110 (putting the zero in front does not matter)
Base two only accommodate 1's and 0's. Base two are called binary.
Check the picture below
Note 10 - 1 in binary equals 1
when we borrow to 1, that zero becomes 10, then 10 minus 1 equals 1.
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5.28 / 12 = 0.44 per oz
7.96 / 18 = 0.4422 rounds to 0.44 per oz
technically, by rounding to the nearest cent, they are the same cost.
That means you first calculate divide and multiply and at the and plus and minus.
So
12 / 2 + 4 - 2 x 3 =
6 + 4 - 6 = 4
82 tens in the same thing as 820 because if you multiply 82 by 10 you get 820