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Grade 1 - Addition And Subtraction Within 20

total lessons: 15
NºActivity titletype

Relating Counting To Addition And Subtraction

1
Adding by Counting On
2
Skip-Counting by 2 to Add 2
3
Subtracting by Counting Backward

Adding Within 20

4
Adding Two 1-Digit Numbers by Making 10
5
Adding Two 1-Digit Numbers Using Doubles Facts
6
Adding Two 1-Digit Numbers Using Doubles Plus One Facts
7
Adding Ones to 2-Digit Numbers by Grouping into 10 and Ones

Subtracting Within 20

8
Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtracting the Ones
9
Subtracting 1-Digit Numbers from 2-Digit Numbers by Grouping into 10 and Ones, Then Subtract from the 10

Word Problems Addition And Subtraction

10
Solving Subtraction Problems Using Doubles Facts of Addition
11
Solving One-Step Word Problems Involving Addition
12
Solving One-Step Word Problems Involving Subtraction

Adding Three Numbers

13
Adding Three 1-Digit Numbers Within 20
14
Solving Word Problems Involving Addition of Three Numbers
15
Solving Word Problems Involving Addition of Three 1-Digit Numbers Within 20