F.1 maths!!!!!急....

2008-08-08 9:03 am

1. Find the place value of the underlined digit in each of the following:
a) 11 101(2) b)23A7(16)
* a個題系第3個1 underline左
b個題系個3 underline左

2. Express the following in expanded form:
a) 1101(2) b) F99D(16)

3. Change the following binary numbers to denary numbers:
a) 10(2) b) 110(2)

4. Change the following denary numbers to binary numbers:
a) 9 b) 35

5. Convert the following hexadecimal numbers into denary numbers:
a) 4E6B(16) b) 4C59(16)

Thank you very much=)

回答 (1)

[匿名]

2008-08-08 4:09 pm

✔ 最佳答案

1. Find the place value of the underlined digit in each of the following:
a) 11 101(2) b)23A7(16)

a) 2^2
=4

b) 16^2
256

2. Express the following in expanded form:
a) 1101(2)
=1X2^3+1X2^2+0X2^1+1X2^0

b) F99D(16)
=15X16^3+9X16^2+9X16^1+13X16^0

3. Change the following binary numbers to denary numbers:
a) 10(2)
=1X2^1+0X2^0
=2(10)

b) 110(2)
=1X2^2+1X2^1+0X2^0
=4+2
=6(10)

4. Change the following denary numbers to binary numbers:
a) 9
=1001(2)

b) 35
=100011(2)

5. Convert the following hexadecimal numbers into denary numbers:
a) 4E6B(16)
=4X16^3+14X16^2+6X16^1+11X16^0
=16384+3584+96+11
=20075

b) 4C59(16)
=4X16^3+12X16^2+5X16^1+9X16^0
=16384+3072+80+9
=19545

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