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Subtraction With Regrouping

Subtraction by "Regrouping"

(Also called "borrowing" or "trading")

       To subtract numbers with more than one digit:

• write down the larger number first and the smaller number directly below it making sure to line up the columns!

                                                                   Video 1

                                                               Video 2

Smaller Number - Bigger Number

But what if a column has a smaller number on the top?

How do you do 2 - 5 ?

The Solution is Make the "2" larger by "regrouping"

 In 32:

• the "3" means 3 tens,
• the "2" means 2 units,

So you:

• reduce the 3 by 1
• increase the 2 by 10

Worksheet 3

Subtraction With Regrouping
55     - 15	67     - 66
43     - 26	83     - 52	79     - 29
80     - 40	45     - 13	83     - 34

 

Worksheet 2

Name  : ________________________

Class :   _______________

Two Digit Subtraction Without Regrouping

1.	74 -  33 _________	2.	58 -  50 _________	3.	90 -  21 _________
4.	31 -  16 _________	5.	90 -  43 _________	6.	98 -  71 _________
7.	51 -  22 _________	8.	13 -  7 _________	9.	66 -  50 _________

Worksheet 1

Name : ____________________

Class : ________

Subtraction

 

1.	6 -  3 _________	2.	6 -  4 _________	3.	3 -  2 _________
4.	7 -  2 _________	5.	9 -  0 _________	6.	5 -  1 _________
7.	5 -  2 _________	8.	7 -  7 _________	9.	6 -  4 _________

Subtraction Without Regrouping

Subtracting Two Digit Numbers without Regrouping

How to subtract two-digit numbers (for example 67 - 45).

·         Place one number above the other so the tens' place digits and ones' place digits are lined up. Draw a line under the bottom number.

  67

-45

·         Subtract the bottom ones' place digit (5) from the top ones' place digit (7) and place the difference (2) below the line in the ones' place column.

  67

-45

    2

·         Subtract the bottom tens' place digit (4) from the top tens' place digit (6). Place the difference (2) below the line in the tens' place column.

   67

 - 45
 22



Subtraction

Other names used in subtraction are Minus, Less, Difference, Decrease, Take Away, Deduct.

The names of the numbers in a subtraction fact are:

Minuend - Subtrahend = Difference

Minuend: The number that is to be subtracted from.

Subtrahend: The number that is to be subtracted.

Difference: The result of subtracting one number from another.

Subtraction is ...

... taking one number away from another.

If you have 5 apples
and you subtract 2,
you will be left with 3.

This would be written:

5 - 2 = 3

If you have two oranges, you eat one of them. How many oranges are left with you?

2 - 1 = 1

Subtration Video 1

Subtraction Video 2