Question

help to solve this questions plz as soon as possible

Answer 1

1)-12/-30=12/30=0.4
2)-88/33= -8/3
3)25/6+25/6=50/6
5)26/33+5/11=26/33+15/33=26+15/33=41/33
 41/33 should be added
6) -3/4+5/9 
Lcm is 36
-27/36+20/36= -27+20/36=-7/36
7)11/5-12/25
Lcm is 25
55/25-12/25
=55-12/25
=43/25

9)5/63-(-8/21)
=5/63+8/21
Lcm is 63
5/63+24/63=5+24/63=29/63

10) -1

11)7

13)2/3+3/4+1/12
Lcm is 12
8/12+9/12+1/12=8+9+1/12=18/12=3/2

14)5/13*78/15
5 threes is 15 and 13 fives are 78
we can cancel 15 by 5 and 78 by 13
=6/3=2

15)-77/36 by 4 5/18
first, convert the mixed fraction into a proper fraction
18*4+5/18 =77/18
now, 
-77/36 by 77/18
we will do reciprocal 
-77/36 * 18/77
18 twos are 36
= -1/2

Answer 2

1)2/5
(-12)/(-30)= 12/30( minus minus cancle )

2)(-8)/3

3){(-25)+25}/6 =0/6

4)12/(-22) & 18/(-33)

5)26/33 - (-5/11) =(26+15)/33 =41/33 =1 8/33

6)(-3)/4 + 5/9 ={(-27)+20}/36 =(-7)/36

7)11/5 - 12/25 =(55+12)/25 =67/25 =2 17/25

8)We can write any example like: (-8)/1 , (-16/2) , (-24/3) etc....

9)5/63-(-8/21) =(5+24)/63 =29/63

10) 1/(-1) is multiplictive inverse of -1.

11) 7 is the additive inverse of (-7).

12) 14/(-30) , 21/(-45) & 28/(-60)

13)2/3+3/4+1/12 =(8+9+1)/12 =18/12 =3/2

14){5/13}×{78/15} =2

15)(-77)/36 ÷ (77/18) =(-1)/2



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