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Worksheet 
5’s Compliment-2 Digit Sums 
 
43 
43 
67 
-24 
22 
34 
87 
-44 
44 
22 
75 
-32 
44 
32 
66 
-32 
43 
43 
56 
-14 
          
44 
14 
76 
-42 
23 
42 
86 
-33 
44 
33 
85 
-43 
41 
14 
67 
-24 
33 
24 
55 
-43 
          
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Page 2


Worksheet 
5’s Compliment-2 Digit Sums 
 
43 
43 
67 
-24 
22 
34 
87 
-44 
44 
22 
75 
-32 
44 
32 
66 
-32 
43 
43 
56 
-14 
          
44 
14 
76 
-42 
23 
42 
86 
-33 
44 
33 
85 
-43 
41 
14 
67 
-24 
33 
24 
55 
-43 
          
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Answer Key 
 
1 2 3 4 5 6 7 8 9 10 
86 43 56 43 66 43 76 34 86 42 
 
 
11 12 13 14 15 16 17 18 19 20 
58 34 65 53 77 42 55 43 57 12 
 
 
 
 
 
 
 
 
 
 
 
 
 
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FAQs on Worksheet Solutions: 5’s Compliment-2 Digit Sums- 2 - Abacus - Class 1

1. What is the concept of 5's complement in binary arithmetic?
Ans. The 5's complement is a method used in binary arithmetic to represent negative numbers. It involves subtracting each digit of a number from 5. For example, to find the 5's complement of the number 23 (which is 2 and 3 in decimal), you would subtract each digit from 5, resulting in 5-2=3 and 5-3=2, giving you a 5's complement of 32.
2. How do you perform 2-digit sums using 5's complement?
Ans. To perform 2-digit sums using 5's complement, first convert the numbers into their 5's complements, then add them together. If there is a carry out, ignore it. The result will be in 5's complement form, which can then be converted back to the regular decimal form by finding the 5's complement of the result if necessary.
3. What are the advantages of using 5's complement over other methods?
Ans. The advantages of using 5's complement include simplified subtraction of binary numbers, as it allows for the use of addition instead, and it helps in reducing the complexity of circuits in digital electronics by streamlining the arithmetic operations.
4. Can you provide an example of a 2-digit sum using 5's complement?
Ans. Certainly! Let's say we want to add 23 and 34 using 5's complement. First, we find the 5's complements: for 23, it's 32, and for 34, it's 21. Now we add them: 32 + 21 = 53. Since there is no carry, the result is simply 53, which is the sum of 23 and 34.
5. What should I do if my result using 5's complement is in the form of a negative number?
Ans. If your result using 5's complement appears as a negative number, you should find the 5's complement of the result to convert it back to its positive equivalent. This will give you the correct answer in the standard decimal form.
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