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Start your free trialyakov delouya
110 Pointsdon't understand the mathematical for binary
How do I calculates the numbers ?
2 Answers
Steven Parker
231,184 PointsHere's one way to decode binary numbers. Make a column for each digit, and starting from the right, put a "1" and then as you move left put double the value of the column next to it. Remember, right-to-left ( THIS WAY ). You'll get something like this, which is a horizontal version of the helper table shown in the quiz:
128 64 32 16 8 4 2 1 <-- 8 columns for 8 digits
Then, put your binary number on the next line, spread into the columns. Now below that, multiply each top number by the binary digit and put the result below. It's easy, since binary digits are either 1 or 0, so you either put the number on top again or zero.
Then finally, add up all the numbers on the bottom row and that's your answer. Like this:
128 64 32 16 8 4 2 1 <-- starting columns
0 0 0 0 0 1 1 1 <-- multiply by your binary digits
--- --- --- --- --- --- --- ---
0 0 0 0 0 4 2 1 <-- add these up: 4 + 2 + 1 = 7
Also, since zeros in front don't count you can skip them. So in this case we really only needed 3 columns.
Jerim Brandalise
3,195 PointsFinally a straight answer!
Charlene Carter
103 PointsCharlene Carter
103 PointsGood GOD THANK YOU
Steven Parker
231,184 PointsSteven Parker
231,184 PointsGlad I could help!
zee17
1,457 Pointszee17
1,457 PointsThank you for this explaination, it really helped me out