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WORKSHEET -1.2

RATIONAL NUMBERS

RATIONAL NUMBERS 1.2- ANSWERS

−6
1) Additive inverse of( ) is ________ .
−5
−6
−
−5
a) 0 b) -( ) c) ( ) d) ( )
− −5 −6
−5
2) Multiplicative inverse of ( )
−6
−6
−
−5
a)0 b) -( ) c) ( ) d) ( )
−5 − −6
4
1
1
4
3) Which property allows to compute x(6x ) as (6x ) x -
3 3 3 3
Ans Associative property
4)Ans positive
5) −
4
6)What should we multiply with − to get the product 1?
3
Ans- -4/3 x ¾

35
15
7- Between the numbers and 40 which one is the greater number
20 40
Ans: LCM( 20,)= 40 , 15 x 2/20x 2 and 35/40 = 30/ 40 and 35/40

35/40 is the greater number

8) Find the sum of 1 and multiplicative inverse of −13
16
16
−3
Ans-1 + 16 = 1- = 13−16 =
−13 13 13 13
1
9) Is 0.3 the multiplicative inverse of 3 ? Why or why not?
3
ANS- 0.3=3/10 3 1/3 = 10/3 , 13/3 X 3/10= 1 So 0.3 is the multiplicative inverse of

10) 23/6

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