Question

Answer all of these questions in order to get 23 points!!

11
12
13
14
15
16
17
18
19
20

Answer 1

naw, I aint drawin no area diagarms

ok remember
(a/b)(c/d)=(ac)/(bd)
and
(a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)
invert and mulitply

11.
(4/5)(3/4)=12/20=6/10=3/5

12.
5/(1/3)=(5/1)/(1/3)=(5/1)(3/1)=15/1=15

13.
convert to improper
5 and 3/6=5 and 1/2=10/2 and 1/2=11/2
1 and 1/11=11/11 and 1/11=12/11
(11/2)(12/11)=(11*12)/(2*11)=132/22=12/2=6/1=6

14.
3 and 5/9=27/9 and 5/9=32/9
(32/9)(3/8)=(32*3)/(9*8)=96/72=4/3=1 and 1/3

15.
2 and 5/6=12/6 and 5/6=17/6
1 and 1/2=2/2 and 1/2=3/2
(17/6)(3/2)=51/12=17/4=4 and 1/4

16.
2 and 3/4=8/4 and 3/4=11/4
(24)/(11/4)=(24/1)/(11/4)= (24/1)(4/11)=96/11=8 and 8/11

17.
estimate
7 and 1/2 rounds to 8
5 and 4/5 rounds to 6
8*6=48
estimate is 48

18.
9 and 8/15 rounds to 10
10*11=110

19.
48 and 5/9 rounds to 49
7 and 1/8 rounds to 7
49/7=7

20.
50 and 3/7 rounds to 50
9 and 2/3 rounds to 10
50/10=5


11. 3/5
12. 15
13. 6
14. 1 and 1/3
15. 4 and 1/4
16. 8 and 8/11
17. 48
18. 110
19. 7
20. 5

Answer 2

11.) 4/5 * 3/4 = 12/20 reduces to 3/5
12.) 5 / (1/3) = 5 * 3 = 15
13.) 5 3/6 * 1 1/11 = 33/6 * 12/11 = 396/66 = 6
14.) 3 5/9 * 3/8 = 32/9 * 3/8 = 96/72 reduces to 4/3 or 1 1/3
15.) (2 5/6) / (1 1/2) = (17/6) / (3/2) = 17/6 * 2/3 = 34/18 reduces to 17/9 or
1 8/9.
16.) 24 / (2 3/4) = 24/(11/4) = 24 * 4/11 = 96/11 = 8 8/11
17.) 7 1/2 * 5 4/5...estimate : 8 * 6 = 48
18.) 9 8/15 * 11...estimate : 10 * 11 = 110
19.) (48 5/9) / (7 1/8)...estimate : 49/7 = 7
20.) (50 3/7) / (9 2/3)...estimate : 50/10 = 5