Page 59 - Revised Maths Wisdom Class - 3

Subtracti on of 4-Digit Numbers 57

COGNITIVE

MAP

Subtraction

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“Subtraction means taking away a number from a given number”

It’s Symbol Recognising Words

It is denoted by ‘–’ sign Subtract

Diff erence
Deduct
Process and Identity Decrease

Number (1) – Number (2) = Number (3) Left
Remain
Minuend Subtrahend Diff erence Minus

Take away

Properties Five

1. Number – 0 = Number 9 – 4

2. Number – Number = 0
3. Number (1) – Number (2) 5 8 – 3
≠ Number (2) – Number (1)

4. Number – 1 = Predecessor 5 – 0 7 – 2

6 – 1
Verification

Subtraction Checking Answer Note
4 5 3 2 1 9 0 9 In subtraction, the order of numbers is

– 2 6 2 3 + 2 6 2 3 very important. We always subtract small
1 9 0 9 4 5 3 2 number from big number.