New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 5 Operations on large numbers Self Practice 5E Solution
Self Practice 5E
1)
a)
23457
+ 38903
————
60000
b) 573289
+ 27167
————
600000
c) 600800
– 431204
————-
200000
d) 1512803
-926704
————–
600000
2)
a) 245 x 29 = 6000
b) 6174 x 285 = 1800000
c) 764 x 552 = 480000
d) 1211 x 509 = 500000
3) Estimated Quotient
a) 29832 is rounded off to 30000 & 8 is rounded off to 10
So estimated quotient will be 30000 / 10 = 3000
Ans – 3000
b) 4423 is rounded off to 4410
So estimated quotient will be 4410 / 21 = 210
Ans – 210
c) 5369 is rounded off to 5400 & 29 is rounded off to 30
So estimated quotient will be 5400 / 30 = 180
Ans- 180
d) 15034 is rounded off to 15000 & 310 is rounded off to 300
So estimated quotient will be 15000 / 300 = 50
Ans- 50
4)
a) 368464 graduates are working in textile industry
1263792 graduates are working in other industry = 1263792 + 388464 = 1632256
Now rounding off to nearest lakh 1632256 = 1700000
Ans – 1700000
b)
Total number of student appeared in a scholarship exam = 413766
Total number of student selected = 270364
= 413766 – 270364
= 143402
Approximately 100000 students were left out.
c) Total Paper clips in a packet = 12218
A shopkeeper buys 9 packets of Paper clips
Actual number of Paper clip = 12218 x 9 = 109962
Approximate number of Paper clip = 100000
d) Total no. of books distributed = 12360
12360 books are packed in 8 packets
So, Each packet Contains = 12360/8 = 1545
Estimated Quotient = 1200