Subtract zero/all

key notes :

1. Subtracting Zero:

  • Concept: When you subtract zero from any number, the result is the same number.
  • Key Rule: A number minus zero equals the original number.
    • Example: 7 – 0 = 7
  • Explanation: Subtracting zero means no change to the original amount.

2. Subtracting All:

  • Concept: When you subtract a number from itself, the result is always zero.
  • Key Rule: A number minus itself equals zero.
    • Example: 5 – 5 = 0
  • Explanation: If you take away everything, nothing is left, so the result is zero.

3. Visual Representations:

  • Use objects like counters or drawings to show that subtracting zero means no change, while subtracting all means taking everything away.
  • Example:
    • Place 5 counters on a table. Subtract 0 counters (nothing is taken away), so 5 counters remain.
    • Now subtract 5 counters (take them all away), and nothing remains.

4. Practice:

  • Subtract Zero: 9 – 0, 4 – 0, 12 – 0
  • Subtract All: 6 – 6, 3 – 3, 8 – 8

Learn with an example

Subtract:

7 − 0 =

When you subtract zero from a number, the number stays the same.

Now subtract:

7 − 0 = 7

Subtract:

3 − 0 =

When you subtract zero from a number, the number stays the same.

Now subtract:

3 − 0 = 3

Subtract:

3 − 3 =

When you subtract a number from itself, the answer is zero.

Now subtract:

3 − 3 = 0

Let’s practice!🖊️