Grade 1 - Addition And Subtraction Within 20

total lessons: 15

Nº	Activity title	type
Relating Counting To Addition And Subtraction
1	Adding by Counting On	Learn Assist practice Benchmark practice
2	Skip-Counting by 2 to Add 2	Learn Assist practice Benchmark practice
3	Subtracting by Counting Backward	Learn Assist practice Benchmark practice
Adding Within 20
4	Adding Two 1-Digit Numbers by Making 10	Learn Assist practice Benchmark practice
5	Adding Two 1-Digit Numbers Using Doubles Facts	Learn Assist practice Benchmark practice
6	Adding Two 1-Digit Numbers Using Doubles Plus One Facts	Learn Assist practice Benchmark practice
7	Adding Ones to 2-Digit Numbers by Grouping into 10 and Ones	Learn Assist practice Benchmark practice
Subtracting Within 20
8	Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtracting the Ones	Learn Assist practice Benchmark practice
9	Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtract from the 10	Learn Assist practice Benchmark practice
Word Problems Addition And Subtraction
10	Solving Subtraction Problems Using Doubles Facts of Addition	Learn Assist practice Benchmark practice
11	Solving One-Step Word Problems Involving Addition	Learn Assist practice Benchmark practice
12	Solving One-Step Word Problems Involving Subtraction	Learn Assist practice Benchmark practice
Adding Three Numbers
13	Adding Three 1-Digit Numbers Within 20	Learn Assist practice Benchmark practice
14	Solving Word Problems Involving Addition of Three Numbers	Learn Assist practice Benchmark practice
15	Solving Word Problems Involving Addition of Three 1-Digit Numbers Within 20	Learn Assist practice Benchmark practice

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