Quick Check
Name
10-7A
3
1?
1. Which is the sum of 8 __
1 2 __
4
2. Which is the difference of
3
1  12 __
?
25__
2
1
A 10__
4
__
B 10 12
8
4
1
A 13__
8
2
B 13__
6
1
C 11__
6
1
C 12__
3
1
D 11__
4
3
D 12__
8
5
1 1 3__
1?
3. What is (9__
)  5__
3
6
6
1
A 18__
3
5
B 8__
6
C 8
D 7
4. WritingtoExplain Emma made a rectangular picture frame
5
2 inches wide.
inches. The frame is 5 __
with a height of 25 __
6
3
What is the height of the picture Emma placed in the picture
frame? Explain how you found your answer.
2
5 3 in.
5
h
25 6 in.
2
5 3 in.
ART FILE:
CUSTOMER:
ScottForesman
CREATED BY:
EDITED BY:
created @ NETSQ 10•7A
REVISION:
TECH
44915_T09_045a
lf
JOB NUMBER:
DATE:
11609
10-20-08
DATE:
TIME:
40 min
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
only altered @ NETS
(place checkmark)
Par tner
Talk
Sh
k.
are
wor
your t
hinking while you
Get Started
or
Get 10 squares in one color and 10 in another color.
Get two number cubes. Take turns with another player or team.
Talk about math as you play!
At Your
Turn
Toss two number cubes. Add the dots. Find your toss below.
Follow the directions. Explain your thinking. Cover the answer.
If the answer is taken, lose your turn. Have fun!
Toss
Read the expression. Explain how to
add or subtract. Simplify the expression.
2
3
4 59 – 2 3
4
23 + 19
5
48 – 14
6
13 + 24
1
2
2
1
7
42 – 13
1 8 + 2 41
8
45 – 22
1
9
1 56 + 2 3
2
4
10
3 4 – 12
3
3
11
2 10 + 1 5
1
3
12
3 6 – 1 31
5
2
1
7
1
1
5
5
28
1
49
1
22
26
3
14
9
1 10
1
4 12
7
38
2
29
5
26
1
42
9
3 10
1
28
5
9
1 10
1
4 12
How to
Win
42
You win if you are the first to get four connected rectangles, like:
5
If you have
more time
Play again!
Center Activity H 10-7A
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Par tner
Talk
Sh
k.
are
wor
your t
hinking while you
Get Started
or
Get 10 squares in one color and 10 in another color.
Get two number cubes. Take turns with another player or team.
Talk about math as you play!
At Your
Turn
Toss two number cubes. Add the dots. Find your toss below.
Follow the directions. Explain your thinking. Cover the answer.
If the answer is taken, lose your turn. Have fun!
Toss
Read the expression. Explain how to
add or subtract. Simplify the expression.
2
4 3 – 2 56
3
2 4 + 1 23
4
(1 3 + 1 41 ) + 2 12
5
6
(4 5 – 2 2 ) + 1 10
2
3
1
7
(2 3 + 2 4 ) – 2 2
8
(5 8 – 1 43 ) – 1 58
9
(2 3 + 2 6 ) – 2 6
10
(1 2 + 2 4 ) + 1 4
(3 8 + 1 2 ) – 2 4
1
11
42 – 15
3
12
2 5 + 1 10
1
3
7
1
1
5
4
7
28
1
7
1
1
1
1
1
3
5
3
3
7
2 10
9
13
2
35
1
52
1
22
11
2 12
1
12
3
4 10
3
35
2
13
1
56
11
28
5
22
2 12
How to
Win
7
4 12
You win if you are the first to get four connected rectangles, like:
3
1
If you have
more time
Play again!
Center Activity HH 10-7A
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Reteaching
Name
10-7A
More Adding and Subtracting
Mixed Numbers
You can use what you know about adding and subtracting
with mixed numbers when you simplify expressions with mixed
numbers.
(
)
1 + 6__
1 – 2__
1.
Simplify 4__
8
4
2
Step 1 Add the mixed numbers in
parentheses first. Find a
common denominator.
1 + 6__
1
4__
8
4
3
1 + 6__
2 = 10__
4__
8
1 from the sum
Step 2 Subtract 2__
2
you found. Find a common
denominator.
8
8
3
1
10__
– 2__
8
2
3
4
10__
– 2__
8
8
3
4 from __
.
You can’t subtract __
8
8
11 – 2__
4 = 7__
7
9___
Step 3 Rename if possible.
8
8
8
In 1 through 9, simplify each expression. Remember to rename
mixed numbers if possible.
(
)
(
)
(
3
6
4 + 2___
– 2___
1. 12__
7
14
14
3
1 + 2__
1
2. 5__
– 3__
5
9
1 + 2___
3. 10___
– 5__
6
5
3
+ ___
+ 1__
4. __
3
4 + 1___
1
5. 1___
+ 1__
5
3
1 + 1__
7
6. 3__
– 1__
5
9
18
6
10
3
2 + __
1 + 7__
7. 1___
12
6
2
4
(
4
2
20
)
5
20
1 – 1___
8. 1__
+ 3__
8
4
24
16
(
8
4
)
16
)
8
3
3
1 + 7___
9. 5__
+ 1__
4
20
4
7 days working on her English paper, 3__
1 days
10. Suzy spent 6__
8
6
1
__
doing her science project, and 1 days studying for her
2
math test. How many days more did Suzy spend on her
English paper and math test than on her science project?
R 10•7A
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Practice
Name
10-7A
More Adding and Subtracting
Mixed Numbers
In 1 through 16, simplify each expression.
1 + 4__
2
1. 2__
8
5
1 – 6__
3. 8__
1 – 3__
2
2. 9__
3
6
( 2 3) 6
( 10__14 – 5__58 ) – 1__38
( 2__23 + 4__56 ) + 3__38
9
4
(
)
5
1 + 8__
2 – 3__
5. 3__
5
1 – 4__
7
6. 14__
+ 1___
8.
3
2 – 5___
2
9. 100___
– 60__
11.
6
9
3
12
3
)
2
8
(
)
3
4 + 5__
7
10. 25__
– 10__
5
8
8
15
5
1 + 4__
1 – 19__
12. 30__
9
(
7 + 3__
1 + 1__
7
7. 7___
18
10
(
3
4 + 5___
4. 6__
5
10
8
(
5
2 + 5__
1 – 1__
13. 7__
6
3
6
9
)
)
14. Which shows three mixed numbers that have sum of 10?
5
3
2 + 3___
+ 4__
A 1__
4
3
1 + 1__
1
C 2__
+ 5__
5
1 + 3__
1 + 3___
B 3__
1 + 1__
7 + 3__
7
D 5__
3
3
12
4
12
8
2
4
4
8
8
1 + 3__
2 + 5__
1?
15. What is a reasonable estimate for the sum of 4__
8
3
2
16. Veronica is buying cubed cheese from Mr. Sand’s deli.
3
pounds. When Mr. Sand places some
She asks for 1__
4
cheese in a container and weighs it, the scale shows
1 pounds. The container weighs ___
1 pound. How many
1__
4
16
more pounds of cheese would Mr. Sand need to add to
the scale to get the amount that Veronica asked for?
Explain how you solved the problem.
P 10•7A
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5
Enrichment
Name
10-7A
Table Time
Make tables to solve. Write each answer in a complete sentence.
1. A train has 3 engines, 52 boxcars, and 1 caboose. At every
stop, it picks up 8 more boxcars. How many total cars (engines,
cars, and cabooses) will the train have after 5 stops?
2. Eileen likes to keep scrapbooks. She already has 4 scrapbooks
filled with 40 pages each. If she fills 5 pages every month, how
many months will it take her to fill up 2 more 40-page scrapbooks?
3. Phil’s Garage charges $50 for towing and $40 per hour to fix a car.
Cliff’s Cars charges $60 for towing and $38 per hour to fix a car.
After how many hours of working on a car will the cost of towing
and fixing a car be the same at the two repair shops?
4. Dominic got a new video game. The first time he played the game
he scored 80 points. After that, each time he played he increased
his score by 60 points. How many times will he have to play before
he scores 500 points?
5. A scientist is studying certain germs. She places 3 germs in a
special solution that will help the germs grow. The number of germs
doubles every hour. How many germs will there be after 8 hours?
6. Ed saved $50 one week. For the next 6 weeks, he saved $25 more than
he saved the week before. How much did he save in all? One student
solved this problem using the expression $50 1 6($25) 5 $200. What
error was made?
E 10•7A
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 5