CBSE Class 8CBSE
Share
Notifications

View all notifications

Find the Values of the Letters in the Following and Give Reasons for the Steps Involved.A B+ 3 7=6 a - CBSE Class 8 - Mathematics

Login
Create free account


      Forgot password?

Question

Find the values of the letters in the following and give reasons for the steps involved.

   A B

+ 3 7

------

   6 A

------

Solution

The addition of A and 3 is giving 6. There can be two cases.

1) First step is not producing a carry

In that case, A comes to be 3 as 3 + 3 = 6. Considering the first step in which the addition of B and 7 is giving A (i.e., 3), B should be a number such that the units digit of this addition comes to be 3. It is possible only when B = 6. In this case, A = 6 + 7 = 13. However, A is a single digit number. Hence, it is not possible.

2) First step is producing a carry

In that case, A comes to be 2 as 1 + 2 + 3 = 6. Considering the first step in which the addition of B and 7 is giving A (i.e., 2), B should be a number such that the units digit of this addition comes to be 2. It is possible only when B = 5 and 5 + 7 = 12.

   2  5

+ 3  7

-------

   6   2

-------

Hence, the values of A and B are 2 and 5 respectively.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics Textbook for Class 8 (2018 to Current)
Chapter 16: Playing with Numbers
Ex. 16.10 | Q: 4 | Page no. 256

Video TutorialsVIEW ALL [1]

Solution Find the Values of the Letters in the Following and Give Reasons for the Steps Involved.A B+ 3 7=6 a Concept: Letters for Digits.
S
View in app×