Book: NCERT - Mathematics
Chapter: 16. Playing with Numbers
Subject: Maths - Class 8th
Q. No. 8 of Exercises 16.1
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8
Find the values of the letters in each of the following and give reasons for the steps involved
While adding 1 and B we get 0 i.e., a number whose ones digits is 0.
This is only possible when digit B is 9.
In that case, the addition of 1 and B will give 10 and, 1 will be the carry for the next step.
In the next step,
1 + A + 1 = B
Clearly,
A is 7 as 1 + 7 + 1 = 9 = B
Therefore, the addition is as follows:
Hence, the values of A and B are 7 and 9 respectively
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