All lessons

Number Line Intro

Read the 0–20 number line, then hop right to add and left to subtract

Move the arrow with − and +, set a jump, then hop to add (right) or subtract (left).

0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Arrow is at

5

Jump size

3

The arrow is on 5.