Use number line to subtract by counting on or counting back (Explanation Of Topic 1 - Lesson 5 - enVision math - Grade 2)

1. Lesson 1-5
Count On & Count Back
To Subtract
T. Rayane Al Samrout

2. Count On
BIGGER

3. Count Back
SMALLER

4. Count OnCount Back
1
0
- 4 = ___1
0
- 4 = ___
4 + __= 1
0
+1 +1 +1 +1 +1 +1
6
6
-
1
-
1
-
1
-
1
6