Review – add one-digit numbers – sums to 10

key notes :-

  1. Understanding One-Digit Numbers: These are numbers from 0 to 9.
    • Examples: 1, 2, 3, 4, 5, 6, 7, 8, 9.
  2. Addition of One-Digit Numbers:
    • Definition: Addition is the process of combining two numbers to find the total.
    • Examples:
      • 2 + 3 = 5
      • 6 + 4 = 10
  3. Sums to 10: Focus on adding two numbers where the result is 10.
    • Combinations of numbers that add up to 10:
      • 1 + 9 = 10
      • 2 + 8 = 10
      • 3 + 7 = 10
      • 4 + 6 = 10
      • 5 + 5 = 10
      • 6 + 4 = 10
      • 7 + 3 = 10
      • 8 + 2 = 10
      • 9 + 1 = 10
  4. Visual Aids: Use objects like counters, number lines, or fingers to help visualize the addition process.
    • Example: To add 3 + 7, count 3 objects, then add 7 more to get a total of 10.
  5. Commutative Property of Addition:
    • Addition is the same no matter the order of the numbers.
    • Examples:
      • 3 + 7 = 10 and 7 + 3 = 10

Learn with an example

Add:

Count the first group of aliens. The first group has 2 aliens.

Count the second group of aliens. The second group has 0 aliens.

To find the sum of 2 and 0, count all the aliens together, like this:

There are 2 aliens, so 2 + 0 = 2.

Add:

Count the first group of robots. The first group has 7 robots.

Count the second group of robots. The second group has 2 robots.

To find the sum of 7 and 2, count all the robots together, like this:

There are 9 robots, so 7 + 2 = 9.

Add:

Count the first group of rockets. The first group has 8 rockets.

Count the second group of rockets. The second group has 2 rockets.

To find the sum of 8 and 2, count all the rockets together, like this:

There are 10 rockets, so 8 + 2 = 10.

Let’s practice!🖊️