Page 43 - Start Up Mathematics_3

Th H T O TTh Th H T O TTh Th H T O
(d) (e) (f)
2 5 4 0 4 3 0 2 3 4 9 0
1 0 3 5 2 9 8 3 5 1 8 8

+ 3 3 1 4 + 7 2 4 7 + 9 2 9 6

2. Add the following numbers.

(a) 4326 and 3132 (b) 6852 and 2135 (c) 6485 and 2946

(d) 2085, 6984 and 9470 (e) 8942, 6125 and 1893 (f) 5045, 1963 and 8275
3. Add using expanded form.

(a) 4621 + 6666 (b) 1002 + 9779 (c) 2658 + 8567

4. Estimate the following sums by rounding off the addends as mentioned in the
brackets.

(a) 2876 + 4905 + 9056 (to the nearest 100)
(b) 1111 + 6590 + 8744 (to the nearest 10)

5. A library has 1000 English books, 1240 Hindi books and 1687 Mathematics
books. How many books are there in the library?

6. Find the number 246 more than 7582.

7. Write True or False.

(a) 1 added to a number gives a number less than the
given number.

(b) 0 added to a number gives the same number.

(c) The sum of 2789 and 1000 is 2889.

(d) The sum of 9 thousands, 9 hundreds and 9 ones is 9999.

8. Choose the correct answer.
(a) 4361 rounded to the nearest 100 is:

(i) 4360 (ii) 4300 (iii) 4400 (iv) 4460

(b) 520 more than 3125 is:
(i) 3645 (ii) 3725 (iii) 3655 (iv) 3755

(c) 1390 rounded to the nearest 1000 is:

(i) 1400 (ii) 1000 (iii) 1490 (iv) 1200

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