6th Grade Math Textbook, Fundamentals

Lesson 4-14 for exercise sets. &KDSWHU 

3UDFWLFH   $FWLYLWLHV

Solve.

1.12.6g4.8  33 2.  7 6.5 3. 9 k4.5 2.7 4.5.1 2.3z 12

5.2.7h4.1 12.2 6.7.8 2.4y 3 7.  5 8.4 8. 4.17. 2

Write and solve an equation for the problem situation.

9.Hilda bought a flashlight. The flashlight cost $9.50, and each

battery cost $1.75. She spent a total of $13 on the flashlight

and the batteries. How many batteries did she buy?

10.Discuss and Write Identify the properties of equality you used in solving

the equation for exercise 4 above. Explain each use of a property of equality.

x

3.5

28 p

2

w

9.2

Solve: 0.3a(3.2)  4

0.3a(3.2) (3.2) 4 (3.2)



a 24

Check:0.3a(3.2)  4

0.3(24)(3.2) 4 Substitute 24 for a.

7.2 (3.2) 4 Simplify.

4  4 Tr u e

Subtract 3.2

from both sides.

?

?

7. 2
   0.3

0.3a

0.3 To “undo” multiplication,divide both sides by 0.3.

2

Write an equation for the problem situation. Solve and check.

Eric bought a sweatshirt. Five dollars more than half what he paid is $23.50.

How much did he pay for the sweatshirt? Let prepresent the amount Eric paid.

Equation:  5 23.50

Solve:  5 23.50

 5  5 23.50  5

(2) 18.50(2)

p 37

So Eric paid $37 for the sweatshirt.

Multiply both

sides by 2.

Subtract 5

from both sides.

p

2

p

2

p

2

p

2

3

Think

4 (3.2)  4 3.2

Check:  5 23.50

5 23.50

18.50 5 23.50 Simplify.

23.50 23.50 Tr u e

Substitute 37

for p.

?

(^37) ?
2
p
2