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Convert 280 from decimal to binary

(base 2) notation:

Power Test

Raise our base of 2 to a power

Start at 0 and increasing by 1 until it is >= 280

20 = 1

21 = 2

22 = 4

23 = 8

24 = 16

25 = 32

26 = 64

27 = 128

28 = 256

29 = 512 <--- Stop: This is greater than 280

Since 512 is greater than 280, we use 1 power less as our starting point which equals 8

Build binary notation

Work backwards from a power of 8

We start with a total sum of 0:


28 = 256

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 256 = 256

Add our new value to our running total, we get:
0 + 256 = 256

This is <= 280, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 256

Our binary notation is now equal to 1


27 = 128

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 128 = 128

Add our new value to our running total, we get:
256 + 128 = 384

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 256

Our binary notation is now equal to 10


26 = 64

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 64 = 64

Add our new value to our running total, we get:
256 + 64 = 320

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 256

Our binary notation is now equal to 100


25 = 32

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 32 = 32

Add our new value to our running total, we get:
256 + 32 = 288

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 256

Our binary notation is now equal to 1000


24 = 16

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 16 = 16

Add our new value to our running total, we get:
256 + 16 = 272

This is <= 280, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 272

Our binary notation is now equal to 10001


23 = 8

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 8 = 8

Add our new value to our running total, we get:
272 + 8 = 280

This = 280, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 280

Our binary notation is now equal to 100011


22 = 4

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 4 = 4

Add our new value to our running total, we get:
280 + 4 = 284

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 280

Our binary notation is now equal to 1000110


21 = 2

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 2 = 2

Add our new value to our running total, we get:
280 + 2 = 282

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 280

Our binary notation is now equal to 10001100


20 = 1

The highest coefficient less than 1 we can multiply this by to stay under 280 is 1

Multiplying this coefficient by our original value, we get: 1 * 1 = 1

Add our new value to our running total, we get:
280 + 1 = 281

This is > 280, so we assign a 0 for this digit.

Our total sum remains the same at 280

Our binary notation is now equal to 100011000


Final Answer



We are done. 280 converted from decimal to binary notation equals 1000110002.