Mental Maths
1. ................. Fill in the blanks:
(a) ................. is the smallest number of 6 digits.
(b) The place value of 0 is always ................. whichever place it occupies.
(c) 10 hundreds = ................. thousand.
(d) 100 thousands = ................. lakh.
(e) The place value of 8 in 278509 is .................
(f) The successor of 9999 is .................
(g) The predecessor of 583086 is.................
(h) The standard form of 40000 + 8000 + 300 + 20 + 5 is .................
2. Find the product.
(a) 925 × 100 =
(b) 6120 × 100 =
(c) 7001 × 1000 =
(d) 5900 × 100 =
(e) 6719 × 1000 =
(f) 8230 × 1000 =
3. Group the numbers and find the product.
(a) 69 × 25 × 4
(b) 625 × 64 × 8
(c) 125 × 68 × 4
(d) 30 × 75 × 6
2. The place value of a digit is the value of a digit because of its place in a number. True or False?
3. How many hundreds are there in 5728?
4. Write the smallest and the greatest 4-digit numbers possible by using the digits 4, 2, 5, 9, only once.
Write the greatest and the smallest 5-digit numbers possible by using the following digits only once. only once
(a) 2, 3, 9, 8, 5, 1
(b) 5, 0, 7, 3, 9, 4
1. Write each of the following in columns and add.
(a) 24569 + 15839
(b) 72365+24579
(d) 325342 + 456248
(e) 46253 + 324872
5. Mr. Mohanty purchased a computer and a washing machine costing 25688 and 7899 respectively. How much money did he pay in all?
6. There are 4995 men, 2927 women, and 3408 children in a village. Find the total population of the village.
7. In an election for a particular seat, there were 4 candidates. They received votes as follows: first 4272, second 8394, third 12817 and fourth 10900. If 755 votes were found invalid, how many votes in all were polled?
8. A number exceeds 73815 by 17658. What is the number?
9. Find the sum obtained when the largest number of 4 digits is added to the least 4-digit even number.
10. Mr. Rohit withdrew 14820, ₹45750 and 9800 from the bank on three successive days. How much money did he withdraw from the bank in all?
11. Ruchi subtracted 24789 from a number. The remainder was 8805. What was the number she started with?
12. A school library has 24037 books in Mathematics, 18507 books in English and 40500 books on other subjects. How many books are there in the library?
3. Solve the following.
(a) 321958 + 356872 – 597627
(c) 639028 + 279017 – 777008
4. A train was travelling from Delhi to Odisha 1875 km away. There were 3764 passengers in the train, of which 1899 were children. How many adults were there in the train?
In a bag 95824 beads can be kept. The bag contains 25088 red beads and 45673 black beads. How many more beads can be put in the bag?
1. Arrange in columns and find the product.
(a) 7623 × 93
(b) 2789 × 235
(e) 47905 × 319
6. A book contains 149 pages. How many pages does 7985 such books contain?
7. There are 1785 students in a school. If school charges 950 as school fee and 750 as conveyance. Find the mobility collection of school.
A. fill in the blanks
1. 625 × 600 – 625 × 100
2. 4299 × 527 – 527 × 2
Comments
Post a Comment