Addition Grade 2 Maths Learning Concept | Orchids International
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Operations

Addition

Addition- To find a total or count the objects together we use addition.

  1. Terms used in the addition
    • Addends: The numbers we add
    • + (Plus): Addition sign
    • Sum: Total after doing addition

    Example:

    G2_1_Addition_Terms

    We have learned the addition of one-digit numbers. Now we will learn the addition of the two-digits numbers.

    Example:

    There are 12 matchsticks and we need to add 22 matchsticks to it.

    Count the total number of matchsticks.

    G2_2_Addition_12 matchsticks

    A bundle of ten matchsticks represents the 1 ten and two individual matchsticks represent 2 ones. It makes number 12.

    G2_3_Addition_22 matchsticks

    Similarly, two bundles of ten matchsticks represent the 2 tens and two individual matchsticks represent 2 ones. It makes number 22.

    Now, we want to count all these matchsticks together.

    Put all the bundles together and individual matchsticks together.

    G2_4_Addition_34 matchsticks

    Three bundles of ten matchsticks represent 3 tens and four individual matchsticks represent 4 ones. It makes number 34.

    So, the sum of the numbers 12 and 22 is 34:

    12 + 22 = 34

    Note:

    • Here we add the numbers at the ones place and the numbers at tens place separately.
    • While doing addition always start by adding ones place numbers.(From right to left)
  2. Representation of the addition
    • Horizontal addition

      Step 1: Write the numbers horizontally connected with plus sign.

      Step 2: Add the ones place numbers.

      Step 3: Add the tens place numbers.

      Example:

      G2_5a_Addition_Horizontal addition

      Step 1: Write the numbers horizontally.

      G2_5b_Addition_Step 1

      Step 2: Add the ones place numbers.

      Here, the first addend at ones place is the number 4, and the second addend at ones place is 5. Add the 4 and 5.

      G2_5c_Addition_Step 2

      Step 3: Add the tens place numbers.

      Here, the first addend at tens place is 2, and the second addend at tens place is 7. Add 2 and 7.

      G2_5d_Addition_Step 3

      So, we get

      G2_5e_Addition_Sum
    • Vertical addition

      (To do vertical addition we use place value tables.)

      Step 1: Write the numbers in place value tables correctly.

      Step 2: Add the ones place numbers.

      Step 3: Addition the tens place numbers.

      Example:

      G2_6a_Addition_Vertical addition

      Step 1: Write the numbers in place value tables correctly. On the write the representation for the numbers is shown.

      G2_6b_Addition_Step 1
      G2_6c_Addition_step 1 tens

      Step 2: Add the numbers at ones place.

      G2_6b_Addition_Step 1
      G2_6c_Addition_step 1 tens

      Step 3: Add the numbers at tens place.

      G2_6b_Addition_Step 1
      G2_6c_Addition_step 1 tens

      So, we get:

      G2_6h_Addition_Sum
  3. Addition with carryover

    Example:

    G2_7_Addition_Carry over

    Step 1: Write the numbers in place value tables correctly.

    G2_7a_Addition_Step 1

    Step 2: Add the numbers at ones place.

    When we add 5 and 7, we get 12. But we can’t write the two-digit number at the ones place.

    G2_7b_Addition_Step 2

    Step 3: Carry over the tens place number of the sum to the next place that is tens place.

    Out of 12 ones, we can make a group of 10 flowers which is 1 ten. So, 2 flowers are remaining which indicates 2 ones.

    G2_7c_Addition_Step 3

    Step 4: Add the numbers at tens place. (Including the carry over number also)

    G2_7d_Addition_Step 4

    So, we get

    G2_7e_Addition_Sum

Misconception:

G2_8_Addition_Misconceptions
  • Write the one-digit numbers at Ones place always.
G2_9_Addition_Mind map
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