Subtraction of Numbers Less than 9

 Mind Maps

Class I - Maths: Subtraction numbers 1 to 9

### At The Table

#### Count And Write In The Boxes

Out of 8 bananas 5 five bananas were eaten.

How many bananas are left?

3 bananas are left.

"When some things are taken away, they are being subtracted".

• The '-'sign shows subtraction.
• Use the sign '-' instead of 'take away'.

#### Cross Out, Say, And Write

- =
• Form 9, take away 3.
• say 9 minus 3 equal 6 or write 9 - 3 = 6
• From 6, take away 4.
• Say 6 minus 4 equals 2
• Write 6 - 4 = 2
- =
• Form 7, take away 5.
• say 7 minus 5 equal 2 or write 7 - 2 = 2
• From 9, take away 5.
• Say 9 minus 5 equal 4.
• Write 9 - 5 = 4
• From 5, take away 2.
• Say 5 minus 2 equal 3 or write 5 - 2 = 3
- =
• Form 4, take away 3.
• say 4 minus 3 equal 1 or write 4 - 3 = 1

### Subtracting One

• Out of 7 oranges, 1 is eaten. How many are left?
• "When we subtract 1 from a number, we get the number just before the given number".

Subtract 1 And Write The Numbers In The Boxes

### Subtracting Zero

• There are 4 biscuits. None is eaten.
• How many biscuits are left?
• 4 biscuits are left.So,

### Subtraction On The Number Line

• John had 10 balloons. He gave 3 balloons to his friend. How many are left with him?
• Start at 10. Then go backwards to 3 spaces.
• You will reach 7. So,

### Subtraction On The Abacus

• Subtract 3 from 4.

• 5 - 2 = 3
• 6 - 1 = 5
• 8 - 4 = 4

### Backward Counting For Subtraction

Subtract 4 from 6 by using the number strip.

• Keep your finger on 6 on the number strip.
• Then move the finger backward by 4 spaces. You will reach 2.So,

• 9 - 4 = 5
• 7 - 5 = 2
• 8 - 7 = 1
• 9 - 2 = 7
• 6 - 5 = 1
• 8 - 1 = 7

### Subtracting A Number From Itself

• Subtract 7 from 7 using the number strip.
• Keep your finger on 7 on the number strip, and then move it backward by 7 spaces. You will reach 0.So,

"When a number is subtracted from itself, the answer is always zero".

Use The Number Strip To Subtract And Write The Answers In The Boxes

### Vertical Subtraction

"Numbers can also be subtracted vertically which is known as vertical subtraction".

We can see that, the answer remains the same if the subtraction is done vertically or horizontally.

Subtract The Following

### Subtraction Facts

Cross Out, Count And Write

### Word Problems

Subtract And Write The Numbers In The Boxes

• There are 5 flowers in a vase, 2 flowers dried. How many flowers are left?
So, 3 flowers are left in the vase.
• There were 7 cars in the garage. Out of which 5 cars moved away. How many cars are left?
2 cars are left in the garage.

### Making Both Sides The Same

• "="is an equal sign. An equal sign means both sides are the same.For example:
• 2 is the same as 1 + 1
• 6 is the same as 4 + 2
• 8 is the same as 5 + 3

Fill In The Boxes To Make Both Sides The Same

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