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Divide:
Find the value and express as a rational number in standard form:
The product of two rational numbers is 15. If one of the numbers is -10, find the other.
Let the number to be found be x
x ×- 10 = 15
x = 15/(-10)
x = 3/(-2)
x = (-3)/2
Hence the number is x = (-3)/2
The product of two rational numbers is - 8/9. If one of the numbers is - 4/15, find the other.
Hence the number is x = 10/3
By what number should we multiply -1/6 so that the product may be -23/9?
Hence the number is x = 46/3
By what number should we multiply -15/28 so that the product may be -5/7?
Hence the number is x = 4/3
By what number should we multiply -8/13 so that the product may be 24?
x = - 39
Hence the number is x = - 39
By what number should -3/4 be multiplied in order to produce -2/3?
x = 8/9
Hence the number is x = 8/9
Find (x + y) ÷ (x —y), if
The cost of 7(2/3) metres of rope is Rs. 12(3/4). Find its cost per metre. 7(2/3) metres of rope cost = Rs. 12(3/4).
The cost of 2(1/3) metres of cloth is Rs.75 1/4. Find the cost of cloth per metre. 2(1/3) metres of rope cost = Rs. 75(1/4)
By what number should (-33)/16 be divided to get (-11)/4?
x = 3/4
The number is x = 3/4
Divide the sum of (-13)/5 and 12/7 by the product of (-31)/7 and (-1)/2
Divide the sum of 65/12 and 8/3 by their difference.
If 24 trousers of equal size can be prepared in 54 metres of cloth, what length of cloth is required for each trouser?
= 54/24
= 9/4 metres
9/4 metres of cloth is required to make each trouser
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Chapter 5: Operations on Rational Numbers Exercise...