Question

1. 8/9 - 10/3 =

a. -2/9

b. -1/9

c. -2 4/9


2. -4/5 - 5/6 =


a. -1/30

b. -49/30

c. -9/30


3. 1/2 - (-5/9) =

a. 6/9

b. 6/18

c. 19/18


4. -1.3 + -3.8 =


a. 5.1

b. -5.1

c. 2.5


5. -2.87 + 4.2 =


a. 1.33

b. -1.33

c. -7.07


6. 82.5 - -89.4 =


a. -7

b. 7

c. 171.9


7. -5.89 - 6.1 =


a. -0.21

b. 11.99

c. -11.99

Answer 1

1) \[\frac{ 8 }{ 9 } -\frac{ 10 }{ 3 }(\frac{ 30 }{ 9 }) =-\frac{ 22 }{ 9 } or -2\frac{ 4 }{ 9 }\]
2) \[-\frac{ 4 }{ 5 }(\frac{ 24 }{ 30 })-\frac{ 5 }{ 6 }(\frac{ 25 }{ 30 })=-\frac{ 49 }{ 30 }\]
3) \[\frac{ 1 }{ 2 }(\frac{ 9 }{ 18 }) - (-\frac{ 5 }{ 9 })(\frac{ 10 }{ 18 }) = \frac{ 19 }{ 18 }\]
4) \[-1.3+-3.8=-5.1\]
5) \[-2.87 +4.2 = 1.33 or 4.2 -2.87 = 1.33\]
6) \[82.5 + 89.4 = 171.9\]
7) \[-5.89 - 6.1 = -11.99\]