RBSE Solutions for Class 5 Maths Chapter 17 Mental Mathematics In Text Exercise is part of RBSE Solutions for Class 5 Maths. Here we have given Rajasthan Board RBSE Class 5 Maths Chapter 17 Mental Mathematics In Text Exercise.
| Board | RBSE |
| Textbook | SIERT, Rajasthan |
| Class | Class 5 |
| Subject | Maths |
| Chapter | Chapter 17 |
| Chapter Name | Mental Mathematics |
| Exercise | In Text Exercise |
| Number of Questions | 3 |
| Category | RBSE Solutions |
Rajasthan Board RBSE Class 5 Maths Chapter 17 Mental Mathematics In Text Exercise
Page No. 94
Practice
Question 1.
Identify the right answer.
(a) 483
(b) 683
(c) 883
(a) 495
(b) 345
(c) 265
Solution.
In the given question first number is in(RBSESolutions.com)between 406 to 496 and second number is in between 30 to 39. Sum of these approximately in between 430 to 550. (a) 483 comes in between these, therefore option (a) 483 is right answer.
In the given question first number may be in between 390 to 399 and second(RBSESolutions.com)bnumber may be in between 102 to 192. Estimate total of these in between 490 to 600. Only one option (a) 495 is in between given option. Hence option (a) 495 is correct answer.
Question 2.
Solve and find correct option.
(a) 572
(b) 613
(c) 512
Solution.
In this practice first number is 750 or more than 750 and less than 760. Whereas second number is 205 or more than this and less than 295. When we subtract 205 or any other number greater(RBSESolutions.com)than this from the number which is less than 760. We will never get 572 and 613 also cannot be obtained. Therefore among all, (c) 512 is the right answer.
Question 3.
Find out the digit which comes in place of in following questions.
Solution.
(a) 5 will come in the first box because when we add 5 tens in 8 tens we will get 13 tens and after writing the ones place digit 3 in answer we will take 1 as carry over the next column. On adding 4 hundred, 2 hundred(RBSESolutions.com)and 1 hundred of carry we will get 7 hundred.
(b) Similarly
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