21. a) Write all the integers between (-8) and (-15).
b) Write 3 negative integers greater than -10.
22. Find:
a) (-20) – (-13)
b) (-32) – (23) + 2
23. a) What fraction of a day is 8 hours ?
b) Express 7
3
4
as improper fraction.
24. Express 11mm as cm using decimal.
25. Latha spent Rs.9.50 for buying a pen and Rs2.50 for one pencil. How
much did she spend?
26. Divide Rs.60 in the ratio 1:2 between Reena and Teena.
III. Answer the following: (8x3=24)
27. Shaina pays Rs7500 as rent for 3 months. How much does she has
to pay for a whole year, if the rent per month remains same.
28. In a collage out of 4320 students, 2300 are girls. Find the ratio of a) Number of girls to the total number of students.
b) Numbers of boys to the number of girls.
29. Take Reena’s present age to be ‘n’ years.
Answers
Answered by
2
21. a)
Thus, the integers that lie between the numbers −8 and −15 are −9, −10, −11, −12, −13, and −14. Hence, we get all the integers that lie between the numbers −8 and −15.
b) (i) The product of a positive and a negative integer is negative. (ii) The product of two negative integers is a negative integer. (iii) The product of three negative integers is a negative integer.
Answered by
1
Answer:
21.-9,-10,-11,-12,-13,-14
22.a)-7
b)-53
23.a)one third
b)31/4
24)1.4cm
25)12 rupees
26) reena =20rs,teena=40rs
27)Rs 30,000
28)a 115:216
b) 101:115
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