Page 213 - Maths Class 05

Practice 1.3
1. a. > b. > c. > d. > e. < f. >
2. a. Successor = 4475310 b. Successor = 45681218 c. Successor = 282431208
Predecessor = 4475308 Predecessor = 45681216 Predecessor = 282431206
d. Successor = 500000001 e. Successor = 2900360 f. Successor = 448156001
Predecessor = 499999999 Predecessor = 2900358 Predecessor = 448155999
3. a. 0 b. 999999 c. 10000 d. 190900001 e. 1
4.
Digits Smallest Number Largest Number
a. 2, 7, 6, 8, 5, 9 256789 987652

b. 3, 1, 0, 2, 8, 7, 4 1023478 8743210

c. 5, 8, 3, 2, 6, 1, 0 1023568 8653210
d. 8, 7, 6, 4, 3, 2, 5, 0 20345678 87654320
e. 2, 3, 9, 6, 7, 4, 5, 8 23456789 98765432

f. 8, 1, 7, 9, 3, 6, 4, 5 13456789 98765431

5. Using the digits 1, 0, 3, the smallest 7-digit number is 1000003 and the largest 7-digit number is 3333310.
6. Numeral of 8 different digits = 87654321
Numeral by reversing the digits = 12345678
\ On comparing the first digit from right, 8 > 1.
\ 87654321 is greater.
Practice 1.4
1. a. 96800000 b. 2300000 c. 21100000 d. 2000000 e. 56500000 f. 80200000 2. a. 8000 b. 3000
c. 4000 d. 25000 e. 1000 f. 24000 3. a. 15 years b. 2800000 teachers c. 5000 people
d. ` 200 4. The smallest number which is rounded to 5000 = 4500
The greatest number which is rounded to 5000 = 5499
5. a. 20000 b. 50000 c. 80000 d. 30000 e. 50000 f. 60000 g. 60000 h. 60000
i. 90000 j. 20000 k. 30000 l. 90000 m. 20000 n. 50000 o. 10000 p. 80000
6. a. 1200, 1700 b. 2300, 2800 c. 4200, 4600 d. 8400, 8900 e. 5300, 5500 f. 3500
7. a. 1, 246, 710 b. 1, 246, 700 c. 1, 247, 000 d. 1, 250, 000 e. 1, 200, 000 f. 1, 000, 000
Practice 1.5
1. a. DCCCXLVI b. DCCCXLII c. DCCCXXXIV d. CCXCVIII e. CMXLVI f. CCXCVI
g. CCCXXXIII h. CLVI i. MCXXII j. CMLIX k. MMDCCXLVI
l. IVDLXXIX m. VMMMCMLXXX n. IXCD o. VMMIX p. XXIVCMLXXV
q. LDCCXCI r. CCXLVMDCCLXIII s. LCMLXXXVI t. LXXMMDCCCV u. XCIICDXXXII
2. a. i b. iii c. ii d. ii e. iii f. ii
Sum Up
1. a. iii b. iv c. iv d. i e. i 2. a. 3171529; 3271529; 3371529; 3471529
b. 87546; 86546; 85546; 84546 c. 28385; 28395; 28405; 28415 d. 278325; 280325; 282325; 284325
e. 48860; 48960; 49060; 49160 3. a. ` 700 b. ` 900 c. ` 3400 d. ` 9100 e. 1300 km
f. 400 m g. 600 cm h. 2500 m i. 400 g j. 900 kg k. 300 l l. 800 mg
4.
Smallest Number Greatest Number
a. 85769 85976

b. 42016 46102
c. 30721 31021

d. 9012 79024

Mathematics-5 213