Class
Name
Date
Reteaching 4-6 Rational Numbers
Evaluate a ~ 7, for a
a
t7=
= 9 and
9 ~2 7
b
= -2. Write in simplest form.
Substitute.
= ~~
= -8
Add.
Write in simplest form.
Evaluate. Write in simplest form.
1.
5, for a ==
2
m
-12 and b
-4 n, for m
= 6
= -5 and n = 3
3. 2x ;- 5, for x == 6 and y
4.
h2
~
for h = 4
2'
5. 2m n_ 8' for m
~ 4' for x
6.
3y
7.
-r - ~
~,
P-
=
2 and n
= 4 and y
=
f or r = - 4 an d s
k
.
8. -k- ' for] == 4 and k
9.
= 21
=
= 10
6
=
2
-12
10 + [2
, for j = 6
3[
10. z2 + 2,forz = 6
z -
4
2
2
2
e
11. 020 ++ bb : for a = 4 and b = -3
12.
13.
14
[ - 2/ + 1
~~
- 50
v3
'
=~:,foru == -3andv = 2
. 2x 2 - 3x
15. '
, f or e = - 6 and j= 5
-
4y
y"~
- - ---~--
, for x = - 1
+ 5
+ 6
,
for y
=
-2
15
Pre-Algebra Chapter 4
_