Subtraction Grade 2 Maths Learning Concept | Orchid International
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Operations

Subtraction

Subtraction- To find difference we do subtraction.

Terms used in the Subtraction

  • Minuend: The number from which the other number subtracted
  • Subtrahend: The number which is subtracted
  • − (Minus): Subtraction sign
  • Difference: Answer after doing subtraction

Example:

G2_1_Subtraction_Terms

We have learned the subtraction of single digit numbers. Now, we will learn the subtraction of the two-digit numbers.

Concept of the subtraction:

Example:

There are 26 matchsticks and we need to subtract 15 matchsticks from it.

G2_2_Subtraction_26 matchsticks

Two bundles of ten matchsticks represent the 2 tens and six individual matchsticks represent 6 ones. It makes number 26.

G2_3_Subtraction_14 matchsticks

One bundle of ten matchsticks will represent the 1 ten and four individual matchsticks will represent 4 ones. It will make number 14.

So, from the six individual matchsticks remove the four matchsticks.

From two bundles of matchsticks remove one bundle of matchsticks.

G2_4_Subtraction_12 matchsticks

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

So, subtracting the number 14 from 26 will get the difference as:

26 – 14 = 12

Here we do the subtraction between individual matchsticks and bundles of matchsticks separately.

We use the same technique for the subtraction of the two-digits numbers.

Note: Always starts subtraction from ones place (From right to left)

Representation of the subtraction

  • Horizontal subtraction:

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

    Step 2: Subtract the ones place numbers.

    Step 3: Subtract the tens place numbers.

    Example:

    G2_5_Subtraction_Horizontal subtraction

    Step 1: Write the numbers horizontally.

    G2_6_Subtraction_step 1

    Step 2: Subtract the ones place numbers.

    Here, the minuend at ones place is 7, and in the subtrahend at ones place is 1. Subtract 1 from 7 and write the difference.

    G2_7_Subtraction_step 2

    Step 3: Subtract the tens place numbers.

    Here, the minuend at tens place is 4, and subtrahend at tens place is 2.

    Subtract 2 from 4 and write the difference at the tens place.

    G2_8_Subtraction_step 3

    So, we get:

    G2_9_Subtraction_Difference

  • Vertical subtraction:

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

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

    Step 2: Do the subtraction of the ones place numbers.

    Step 3: Do the subtraction of the tens place numbers.

    Example:

    G2_10_Subtraction_Vertical subtraction


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

    G2_11_Subtraction_Step 1


    Step 2: Do the subtraction of the ones place numbers.

    Subtract 5 from 8. Remove the 5 flowers from 8 individual flowers.

    G2_12_Subtraction_Step 2


    Step 3: Do the subtraction of the tens place numbers.

    Subtract 2 from 6. Remove 2 bundles from the 6 bundles.

    G2_13_Subtraction_Step 3

    So, we get

    G2_14_Subtraction_Difference

Subtraction with regrouping

Example:

G2_15_Subtraction_Regrouping


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

G2_16_Subtraction_Step 1


Step 2: Do the subtraction of the ones place numbers.

In the minuend, ones place number is 2, and in the subtrahend ones place number is 8. We need to subtract 8 from 2. We need to remove 8 individual flowers but we have only 2 individual flowers. (We can’t subtract a smaller number from a bigger one.) So, we need to borrow some flowers from tens place. Add one more row above the minuend.

G2_17_Subtraction_Step 2


Step 3: Borrow 1 ten from 4 tens. It will make 10 individual flowers at the ones place. So, there are total 12 individual flowers. And there are 3 tens remaining.

Write 3 tens at the tens place and 12 ones at the ones place.

G2_18_Subtraction_Step 3


Step 4: Do the subtraction of the ones place numbers.

Remove 8 flowers from 12 individual flowers.

G2_19_Subtraction_Step 4


Step 5: Do the subtraction of the tens place numbers.

Now, there are 3 tens. Remove 1 ten from 3 tens.

G2_20_Subtraction_Step 5

So, we get

G2_21_Subtraction_Difference

Misconception:

G2_22_Subtraction_Misconception
  • Be careful while writing the numbers in the place value table.
  • Always write the one-digit number in ones place.
  • Never subtract the minuend ones place number from the subtrahend ones place number.
  • After regrouping, don’t subtract the subtrahend tens-place number from the minuend previous tens-place number.
G2_23_Subtraction_Mind map
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