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Name
Lesson 1
Reteach
Another Way to Add
Making a 10 can help you add.
27 + 13
27 + 3 + 10
30 + 10 = 40
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
There is a number sentence in each column with
the same sum. Start in the first column. Connect
number sentences with the same sum.
1. 34 + 16
57 + 3 + 20
10 + 60
2. 52 + 28
34 + 6 + 10
70 + 20
3. 45 + 15
10 + 7 + 53
60 + 20
4. 57 + 23
50 + 2 + 28
50 + 30
5. 66 + 24
66 + 4 + 20
50 + 10
6. 17 + 53
45 + 5 + 10
40 + 10
25
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
PDF Proof
Vendor: Aptara
Grade: 2
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Name
Lesson 2
Reteach
Regroup Ones as Tens
Add. Regroup when you have 10 ones.
Step 1
Step 2
1
18
+6
18
+6
ones =
ten
ones
Add the ones.
Add the tens.
Add. Regroup when you have 10 ones.
Step 1
Step 2
ones =
ten
one
Add the ones.
Add the tens.
36
+6
2. 36
+6
ones =
ten
ones
26
Add the ones.
Add the tens.
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
PDF Proof
Vendor: Aptara
Grade: 2
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24
+7
1. 24
+7
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Name
Lesson 3
Reteach
Add to a Two-Digit Number
Find the sum. Regroup if you need to.
Step 1
Step 2
16
+6
1
1
+
6
6
16
+6
22
ones =
ten
ones
Add the ones.
Add the tens.
Add. Regroup if you need to.
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
Step 1
Step 2
1. 35
+6
3
+
ones =
ten
one
5
6
35
+6
Add the ones.
Add the tens.
2. 24
+9
2
+
ones =
ten
ones
Component: C03_Reteach
PDF Proof
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Grade: 2
24
+9
Add the ones.
Add the tens.
27
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
4
9
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Name
Lesson 4
Reteach
Add Two-Digit Numbers
June has 28 stickers.
Pam gives her 16 more stickers.
How many stickers does June have now?
Step 1
28
+16
10
1
1
10
1
1
1
1
1
1
Step 2
Step 3
Regroup 14 ones
RCLQ MLCQ
as 1 ten and 4 ones.
10
10
1
1
1
1
1
1
1
1
10
1
10
10
1
28
+16
44
June has
44 stickers.
Add. You can use counters to help. Regroup if
you need to.
3
+2
2. tens ones
7
7
3
+1
4. tens ones
1
+6
5
5
5. tens ones
9
8
3
+4
6
3
28
3. tens ones
4
+2
8
5
6. tens ones
5
+2
4
7
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
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Grade: 2
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1. tens ones
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Name
Lesson 5
Reteach
Rewrite Two-Digit Addition
You can write the same fact different ways.
42 + 25 is the same as
42
+ 25
Draw a line to match the addition facts.
1. 33 + 74
89 + 22
89
+ 22
53 + 99
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
2.
3. 75 + 48
33
+ 74
4. 19 + 56
19
+ 56
5.
67
+ 15
75
+ 48
6.
53
+ 99
67 + 15
29
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
PDF Proof
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Grade: 2
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Name
Lesson 6
Reteach
Add Three or Four Two-Digit Numbers
You can make a ten when you are adding three or
four two-digit numbers.
1
16
15
+ 64
1. Make a ten with two numbers
from the ones column.
2. Add the 10 to the number(s)
left in the ones column.
Step 1
6 + 4 = 10
95
Step 2
3. Regroup if you need to.
Then solve for the ones
place.
10 + 5 = 15
4. Add the tens column.
1.
15
10
+5
2.
41
19
+ 33
3.
34
26
+ 20
4.
14
6
3
+ 50
30
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
Make a ten to add.
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
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Grade: 2
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Lesson 7
Reteach (1)
Problem Solving
STRATEGY: Make a Model
Gabe rode his scooter 4 blocks to Carters’s house.
Then, Gabe rode to soccer practice and back home.
The soccer field is 10 blocks away from Carter’s house
and 8 blocks away from Gabe’s house. What is the
total number of blocks Gabe rode his scooter?
Step 1
What do I know?
4
10
Gabe rode
Understand
Gabe rode
Carter’s house.
blocks to Carter’s house.
blocks to the soccer field from
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
Gabe rode 8 blocks from the soccer field
back to his house.
What do I need to find?
The total number of blocks Gabe rode his scooter.
Step 2
How will I solve the problem?
Plan
Step 3
make a model
I will
Make a model with base-ten blocks.
Solve
22
Gabe rode
Step 4
Check
blocks in all.
How do I know my answer is reasonable?
4
+
10
+
8
=
22
31
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
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Grade: 2
blocks
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Name
Lesson 7
Reteach (2)
Problem Solving
STRATEGY: Make a Model
Apply the strategy to solve.
1. Emily, Logan, and Carlos just finished their soccer
season. Emily and Logan each scored 8 goals.
Carlos scored 10 goals. How many goals did they
score altogether?
goals
2. Madison, Caden, and Lucas each walked 3 miles.
How many miles did they walk in all?
miles
chapters
4. Claire saw 3 bears and 7 monkeys at the zoo. Luke
saw 4 otters and 3 wolves. How many animals did
they see altogether?
animals
5. Wyatt donated 4 cans of food. Gavin donated 9 + 6
cans. Lyla donated 11 cans. How many cans did
they donate in all?
cans
32
Grade 2 • Chapter 3 Add Two-Digit Numbers
Program: My Math 2013
Component: C03_Reteach
PDF Proof
Vendor: Aptara
Grade: 2
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
3. Bella read 3 chapters. Eli read 1 more chapter than
Bella. Austin and Sarah each read 1 less chapter
than Bella. How many chapters did they read in all?