INTERNATIONAL INDIAN SCHOOL,RIYADH
SA 1 : WORKSHEET 2013-14
CLASS :VII
SUBJECT: MATHEMATICS
CH. 1 : INTEGERS
I FILL IN THE BLANKS
1. ________________ is the additive identity and _______________ is the
multiplicative identity of integers.
2. (-1) x even number of times = _______________
3. (-1) x odd number of times = _______________
4. 38 ÷ 0 = _______________
5. 0 ÷ 11 = _______________
6. 13 ÷ 1 + _______________
7. 55 + _______________ = 0
8. (-31) + _______________ = 0
9. (-55) + _______________ = -89
10. (-33) + _______________ = 79
11. 1000 + _______________ = - 1000
12. [ (-7) + 9] + (_______________) = 9 + [ -7 + 4]
13. (-6) + 2 = 2 (_______________)
14. 251 ÷ _______________ = 1
15. (-70) ÷ _______________ = 5
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16. _______________ ÷ 993 = 0
17. _______________ ÷ 2395 = 1
18. (-3589) ÷ _______________ = -1
19. 22 ÷ _______________ = -11
20. (-1) x (-1) x (-1) x (-1) x (-1) = _______________
II ANSWER THE FOLLOWING :
1. A man travelled 30 km east of a place A and reached B. From B he travelled
60 km west of B and reached C. Find the distance of C from A.
2. A man has Rs. 20,000 in his account in a bank. He withdraws Rs. 3000 per
month for the first two months and deposits double of this amount on third
month. What will be the balance in his account after 3 months?
3. Verify a – (-b) = a + b for the following values of a and b.
i) a = -17 b = +15 ii) a = 50 b = 21
4. Use >, < OR = symbols in the blank space in each of the following
a. (-3) - (-5) (-4) + (-9)
b. 71 -2 - 31 71 - 2 +31
c. 39 + (-35) – (58) 37 + (-11) - (+26)
d. 23 + (-8) - 7 9 - 13 + 12
5. The temperature at a place rises from – 200c to 200c. What is the rise in
temperature ?
6. A place P is 82 m above the Sea level and another place is 13 m below the
Sea level. What is the distance between the two places?
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7. Write down a pair of integers whose
i) sum is - 6 ii) difference -8
iii) difference 3 iv) sum 0
8. Write a negative integer and a positive integer whose
a) sum -9 b) difference -4 c) sum 0
9. Find the value of each of the following products
i) (-3) x 15 ii) 4 x (-13) iii) (-23) x (-31)
iv) (-3) x (-2) x 7 v) 2 x (-3) x (-1) x (-5)
vi) (-259) x (-51) x 0 vii) (-8) x 2 x (-3) x 5 x (-1)
viii) (-2) x (-4) x 0 x (-6) x (-8) ix) (-5) x (-3) x (-4) x (-6) x (-7)
10. Verify the following
i) (-25) x [ (-7) + (-15)] = [ (-25) x (-7)] + [ (-25) x (-15)]
ii) (-7) x [(-8) + 9] = [-7 x (-8)] + [(-7) x 9]
11. What will be the sign of the product a x b if
i) a is the product of 5 positive integers and b is the product of 9 negative
integers.
ii) a is the product of 6 positive integers and b is the product of 8 negative
integers.
iii) a is positive and be is the product of 50 negative integers.
12. Find the value of a if product of a with -1 is
i) 200 ii) 0 iii) -300
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13. Find the product using suitable proportion :-
a. 8759 x 2391 - 2391 x 7759
b. (-9785) x 937 + (-215) x 937
c. 35 x (-25) x (-4) x 10
14. Find the value of each of the following
i) 39 ÷ (-13) ii) (-729) ÷ 9 iii) (-144) ÷ (-12)
iv) (-20000) ÷ (-200) v) 20513 ÷ (-1)
v) (-49) ÷ [ (-48) + (-1) vii) [ 84 ÷ (-12) ] ÷ 7
viii) [(-10) + 5] ÷ [ 20 + (-15)]
15. In a test (+5) marks are given for every correct answer and (-2) marks are
given for every incorrect answer
i) Rohan answered all questions and scored 24 marks though he got 8
correct answers.
ii) Smitha answered all questions and scored (-15) marks though he got 3
correct answers. How many incorrect answer had they attempted?
16. In a class test containing 15 questions 4 marks are given for every correct
answer and (-1) marks are given for every incorrect answer.
i) Gokul attempts all questions but only 6 of his answers are correct. What
is his total score?
ii) Neena gets 12 of her answers correct. What will be her score?
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