One's complement representation in decimal. 1. If the leftmost bit is 0(positive number), a. Change the entire number from binary to decimal. b. Put a plus sign (+) in front of the number. 2. If the leftmost bit is 1(negative number), a. Complement the entire number (changing all 0s to 1s, and vice versa). b. Change the entire number from binary to decimal. c. Put a negative sign (-) in front of the number. Two's complement representation in decimal. 1. If the leftmost bit is 0(positive number), a. Change the whole number from binary to decimal. b. Put a plus sign (+) in front of the number. 2. If the leftmost bit is 1(negative number), a. Leave the rightmost bits up to the first 1(inclusive) unchanged. Complement the rest of the bits. rightmost bits up to the first 1 means从右边算来一直到第一个1的部份 b. Change the whole number from binary to decimal. c. Put a negative sign (-) in front of the number. p.s.LSB means? Questions: (a) The two’s complement of (0101001)2 is 26 – (0101001) = 1000000 – 0101001 = 10111 Here n = 6 and r = 2. I thought it should be 1010111? -- ......ID...... ......I am a learning Dancer...... Shake my body through the music... Dance with the Feel... This is my ID...... --

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