Binary Multiplication Practice PDF

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School of Business, Economics and Informatics

Binary Multiplication Practice Multiply the following binary numbers together:

2)

10101 × 11

3)

11001 × 101

4)

1011110 × 101

5)

1110001 × 110

6)

101001 × 110

7)

1101 × 1011

8)

110 × 1011

9)

1111 × 11

10)

111001 × 11

1) 11110 2) 111111 3) 1111101 4) 111010110 5) 1010100110 6) 11110110 7) 10001111 8) 1000010 9) 101101 10) 10101011

1010 × 11

Answers:

1)

You can find detailed answers on the following page.

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School of Business, Economics and Informatics

Binary Multiplication Practice Answers Explained Break up the second term into 1, 10 100 etc. Multiply the first term with each these new parts. Add together the multiples. Don’t forget, multiplication is commutative, so can change the order of the terms to get to an easier multiplication. Multiply the following binary numbers together: 1) 1010 × 11 = 1010 × 10 + 1010 × 1 = 10100 + 1010 = 11110 2) 10101 × 11 = 10101 × 10 + 10101 × 1 = 101010 + 10101 = 111111 3) 11001 × 101 = 11001 × 100 + 11001 × 1 = 1100100 + 11001 = 1111101 4) 1011110 × 101 = 1011110 × 100 + 1011110 × 1 = 101111000 + 1011110 = 111010110 5) 1110001 × 110 = 1110001 × 100 + 1110001 × 10 = 111000100 + 11100010 = 1010100110 6) 101001 × 110 = 101001 × 100 + 101001 × 10 = 10100100 + 101001 = 11110110 7) 1101 × 1011 = 1101 × 1000 + 1101 × 10 + 1101 × 1 = 1101000 + 11010 + 1101 = 10001111 8) 110 × 1011 = 1011 × 110 = 1011 × 100 + 1011 × 10 = 101100 + 10110 = 1000010 9) 1111 × 11 = 1111 × 10 + 1111 × 1 = 11110 + 1111 = 101101 10) 111001 × 11 = 111001 × 10 + 111001 × 1 = 1110010 + 111001 = 10101011

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