Children will learn several methods for mentally adding multiples of 10 and ones to two-digit numbers through a series of 5 math lessons. The lessons cover adding tens, adding ones, adding tens and ones, using a hundred chart to add two-digit numbers, and using number patterns to solve problems. The objective is to help children develop fluency in mental math skills for adding various combinations of ones and tens to two-digit numbers.

1. Topic 6
Math

2. Connect:
Lesson 6-1 (Adding Tens)
Objective: Children will mentally add multiples of 10 to a
two-digit number.
A parent adding up groceries
A coach adding touchdown scores

3. 44 + 20 =_____
4 4 2 0
60
4
64

5. 7 more pencils
Lesson 6-2 (Adding Ones)
Objective: Children will mentally add a two-digit number
and a one-digit number.
Connect:
3 + 7 = 10
10 – 3 = 7
Check using Addition

6. Academic Vocabulary
17 + 4 =_____
and
So,
20 + 1 = 21
17 + 4 = 21
21

8. 64 markers
Lesson 6-3 (Adding Tens and Ones)
Objective: Children will add a two-digit number to a two-
digit number using mental math.
Connect:
28 colored pencils

9. Math Problem
2 4 4
6
80 + 8
= 88

11. Lesson 6-4 (Adding on a Hundred Chart)
Objective: Children will use a hundred chart to add 2 two-
digit numbers.
Connect:
Maps show where things and places are.

12. 32 + 43 = ______
32
75

14. 2, 4, 6, ___, ____, ____ …………..
Lesson 6-5 (Problem Solving: Look for a
Pattern)
Objective: Children will use number patterns to solve problems.
Connect:
10, 20, 30, ___, ____, ____ …………..
8 12
10
40 60
50
What might happen next in a story, the weather

15. Math Problem
3 5 7
+ 2
+ 2
3 + 0 = 3
3 + 2 = 5
5 + 2 = 7
7 + 2 = 9
9

17. Topic Test 6