Page 213 - Start Up Mathematics_4

6. (a) CDXIII (b) XXIII (c) XLIX (c) TTh Th H T O
(d) XX (e) DCCXIII (f) CLXV 3 2 7 1 2
(g) L (h) CCXCV
2 5 3 4 5
Scratch Your Brain + 2 1 5 6 8
1. (a) MDCLXVI (b) MCDXLIV
2. LID, MID 7 9 6 2 5
Chapter 3: Addition (d) L TTh Th H T O
1 6 3 8 4 5
Let’s Recall 2 1 4 7 0 3
1. (a) 1,111 (b) 1,965 (c) 13,058 (d) 16,722 + 3 2 3 0 8 1
2. (a) 1,334 (b) 6,421 (c) 3,041 (d) 9,359
3. (a) 1,100 (b) 4,100 (c) 11,300 (d) 3,600 7 0 1 6 2 9
4. 3,343 km 5. 8,332 3. (a) 1,35,673 kg (b) ` 8,26,171 (c) 5,79,421
6. (a) 7,532 (b) odd (c) 6,479 (d) 10,087 (d) ` 7,43,520 (e) ` 4,97,625 (f) 8,35,603
4. (a) Actual sum = 3,30,467 Estimated sum = 3,30,000
Exercise 3.1 (b) Actual sum = 1,32,054 Estimated sum = 1,32,000
1. (a) 62,218 (b) 8,72,475 (c) 66,079 5. Students to do on their own.
(d) 1,38,245 (e) 4,95,845 (f) 84,835
(g) 16,119 (h) 8,38,884 (i) 92,358 Let’s Evaluate (b) 6,65,878 (c) 10,63,190
1. (a) 4,06,726
2. (a) Addends → 4,00,723 and 3,68,912 (d) 8,25,894 (e) 10,18,396 (f) 12,87,710
Sum → 7,69,635 (g) 8,68,881
(b) Addends → 2,89,916 and 6,30,249 2. ` 7,87,845
Sum → 9,20,165 3. (a) L TTh Th H T O
(c) Addends → 75,648 and 28,503
Sum → 1,04,151 4 6 7 2 9 3
(d) Addends → 63,254 and 29,046 2 8 5 4 2 6
Sum → 92,300 + 1 1 9 2 3 4
(e) Addends → 2,20,496 and 3,406 8 7 1 9 5 3
Sum → 2,23,902
(f) Addends → 6,10,420 and 2,42,108 (b) L TTh Th H T O
Sum → 8,52,528 4 5 2 6 8 9
3. (a) Eighty-eight thousand one hundred two 1 1 0 2 1 4
(b) Seven lakh seventeen thousand one hundred + 3 6 5 3 4
forty-four 5 9 9 4 3 7
(c) Six lakh fourteen thousand six hundred one
4. (a) 32,295 (b) 6,90,275 4. (a) 3,64,300 (b) 9,57,900 (c) 7,94,300
5. 11,10,996
Exercise 3.2
1. (a) 69,263 (b) 70,613 (c) 55,511 (d) 7,60,955 Values and Life Skills 2. ` 2,73,760
1. 7,58,005 people
(e) 6,83,524 (f) 8,79,385 (g) 95,048 (h) 59,877
2. (a) TTh Th H T O Scratch Your Brain
1. (a) 8 + 5 = 13
2 4 5 6 3
80 + 50 = 130
+ 1 2 6 3 8
800 + 500 = 1,300
3 7 2 0 1
8,000 + 5,000 = 13,000
(b) L TTh Th H T O (b) 4 + 7 = 11
2 7 8 4 5 2 40 + 70 = 110
+ 5 6 4 7 9 6 400 + 700 = 1,100
8 4 3 2 4 8 4,000 + 7,000 = 11,000

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