Solving Equations with Rational Numbers

1
3-6
Solving Equations with Rational Numbers
Warm Up
Lesson Presentation
Pre-Algebra
2
Warm Up Add or subtract.
5 10
7 10
5 16
3 8
2.
1.

2 1
3. 4.8 3.6
4. 2.4 0.05
8.4
2.35
3
Learn to solve equations with rational numbers.
Math fact If a problem starts out in decimal
form, then your answer is in a decimal. If a
problem starts out with fractions, then your
answer is in fraction form.
4
m 4.6 9
Solve.
-4.6 -4.6
m 4.6 9
Check.
(4.4) 4.6 9
9 9
5
Solve.
8.2p 32.8
8.2 8.2
8.2p 32.8
Check.
8.2(-4) 32.8
-32.8 32.8
6
Solve.
x 18
(18)
Check.
7
Solve.
8
Solve.

9
Solve.
10
Ricks car holds the amount of gasoline as
his wifes van. If the cars gas tank can hold
15.5 gallons of gasoline, how much gasoline
can the tank in the minivan hold?
11
Van
Car
12
Lesson Quiz Part 1
Solve.
x 41.1
1. x 23.3 17.8
2 3
3 4
2. j 14
3 5
d
3 8
3. 9y
4.

2

4
13
Lesson Quiz Part 2
Tamara had 6 bags of mulch for her garden. Each
bag contained 8 lb of mulch. What was
the total weight of the mulch?
5.
50 lb
14
Homework

• Pg 138
• 1 41 odd
• 48 54 all