Question

Q1 find the sum by suitable, arrangement
(a) 15209+ 318+791+22
(b) 1+2+3+4+5+95 +96 +97+98.
Q2 find the value of the various properties
(a)20 X 625 X 8 X50
(b)8765 X999 +8766
(c)389×17+389×23+389×60
Q3 find using distributive property
(a) 789×102
(b) 5098×999
(c) 398X17+398 X 23 +398X60​

Answer 1

1 a. (15209 + 791) + (318+22)

16000 + 340

16340

1. b 1 + ( 98+2) + (97+3) + (96+4 ) +(95+5 )

1 +100 + 100 + 100 +100

401

2 a ( 625 * 8 ) ( 20 * 50 )

1000 + 1000

2000

2 b. (8765 * 1000) + 1

8765000 +1

8765001

2. c. 389 * ( 17 + 23 +60 )

389 * 100

38900

3 a 789 ( 100 + 2)

78900 + 1578

80478

3 b 5098 * ( 1000 - 1 )

5098000 - 5098

5092902

3 c. question is repeated