Book: NCERT - Mathematics
Chapter: 16. Playing with Numbers
Subject: Maths - Class 8th
Q. No. 10 of Exercises 16.1
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10
Find the values of the letters in each of the following and give reasons for the steps involved
While adding A and B we get 9 i.e., a number whose ones digits is 9.
The sum can be 9 only as the sum of two single digit numbers cannot be 19.
Therefore, there will not be any carry in this step
In the next step, 2 + A = 0
It is possible only when A = 8
2 + 8 = 10 and 1 will be the carry for the next step.
1 + 1 + 6 = A
Clearly, A is 8.
We know that the addition of A and B is giving 9. As A is 8, therefore, B is 1
Hence, the addition is as follows:
Hence, the values of A and B are 8 and 1 respectively
10
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