Grade 1 - Addition And Subtraction Within 20

total lessons: 18

Nº	Activity title	type
	Relating Counting To Addition And Subtraction
1	Skip-Counting by 2 to Add 2	Math Soccer
2	Subtracting by Counting Backward	Bar Model Scale
	Adding Within 20
3	Adding Two 1-Digit Numbers by Making 10	Mental Math Master
4	Adding Two 1-Digit Numbers Using Doubles Facts	Build Your Robot
5	Adding Two 1-Digit Numbers Using Doubles Plus One Facts	Mental Math Master
6	Adding Ones to 2-Digit Numbers by Grouping into 10 and Ones	Mental Math Master
7	Adding Within 20: Games	Mental Math Master Bar Model Scale Math Soccer
8	Doubles Facts: Games	Build Your Robot Math Soccer Mental Math Master Bar Model Scale
	Subtracting Within 20
9	Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtracting the Ones	Mental Math Master
10	Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtract from the 10	Mental Math Master
11	Subtracting Within 20: Games	Bar Model Scale Mental Math Master Math Soccer
	Word Problems Addition And Subtraction
12	Solving Subtraction Problems Using Doubles Facts of Addition	Math Soccer Build Your Robot
13	Solving One-Step Word Problems Involving Addition	Mental Math Master
14	Solving One-Step Word Problems Involving Subtraction	Mental Math Master Bar Model Scale
	Adding Three Numbers
15	Adding Three 1-Digit Numbers Within 20	Mental Math Master
16	Solving Word Problems Involving Addition of Three Numbers	Bar Model Scale Mental Math Master
17	Solving Word Problems Involving Addition of Three 1-Digit Numbers Within 20	Mental Math Master
18	Adding Three Numbers: Games	Bar Model Scale Mental Math Master

Grade 1 - Addition And Subtraction Within 20

Relating Counting To Addition And Subtraction

Adding Within 20

Subtracting Within 20

Word Problems Addition And Subtraction

Adding Three Numbers