Ch. 1 : Whole Numbers
1) Write the following numbers in words :
a) 9,89,765 b) 10,98,761
2) Write the place value of the underlined digits in the following numbers :
a) 543343 b) 876546 c) 15436777
3) 8987650 = 8000000 + 900000 + _________ + _________ + _________ + 50
4) Complete the following number patterns :
a) 56900, 57900, _________, _________, _________
b) 12490, _________, 12690, _________, 12890
5) Round off 128976 to nearest
a) ten thousands b) lakhs c) thousands
: Refer rules written in the notebook for the questions related to estimation :
6) Estimate the sum :
a) 12345 + 23678
b) 6765 + 34897
7) Estimate the difference :
a) 67588 - 16243
b) 24565 - 4567
8) Estimate the product :
a) 3459 X 876
b) 5665 X 56
9) How many factors does the number 64 have? List all of them.
10) Write all multiples of 15 which are less than 120. How many such multiples are there?
11) Find HCF of :
a) 45 and 36
b) 120 and 160
12) a) Is 18 a common factor of 24 and 72? Why?
b) Is 78 a common multiple of 26 and 6? Why?
1) Write the following numbers in words :
a) 9,89,765 b) 10,98,761
2) Write the place value of the underlined digits in the following numbers :
a) 543343 b) 876546 c) 15436777
3) 8987650 = 8000000 + 900000 + _________ + _________ + _________ + 50
4) Complete the following number patterns :
a) 56900, 57900, _________, _________, _________
b) 12490, _________, 12690, _________, 12890
5) Round off 128976 to nearest
a) ten thousands b) lakhs c) thousands
: Refer rules written in the notebook for the questions related to estimation :
6) Estimate the sum :
a) 12345 + 23678
b) 6765 + 34897
7) Estimate the difference :
a) 67588 - 16243
b) 24565 - 4567
8) Estimate the product :
a) 3459 X 876
b) 5665 X 56
9) How many factors does the number 64 have? List all of them.
10) Write all multiples of 15 which are less than 120. How many such multiples are there?
11) Find HCF of :
a) 45 and 36
b) 120 and 160
12) a) Is 18 a common factor of 24 and 72? Why?
b) Is 78 a common multiple of 26 and 6? Why?
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