Page 71 - Revised Maths Wisdom Class - 2

Addition and Subtraction of 3-Digit Numbers 69

There are 106 scissors in the drawer.
Raj placed 115 more scissors in the

drawer. How many scissors are there
now in total?

Answer: There are _________ scissors
in total.

Subtraction of 3-digit Numbers without Borrowing

Let us subtract 513 from 786.

Step 1: Write the numbers in columns. H T O
7 8 6
Step 2: Subtract the ones digits: 6 – 3 = 3. – 5 1 3
Write 3 in ones column. 2 7 3
Step 3: Subtract the tens digits: 8 – 1= 7.

Write 7 in tens column.

Step 4: Subtract the hundreds digits: 7 – 5 = 2.
Write 2 in hundreds column.

Alternative Methodd
Alternative Metho
Subtraction with Counters

Let us subtract 513 from 786.

Hundreds Tens Ones + – = 0

= 100 = 10 = 1

+ + + + + + + + + + + + + + + 786

+ + + + + + 7 8 6
– – – – – – – – – 513

+ + + + + – 5 1 3

– – – – – + + + + + + + + + + 786 – 513 2 7 3

+ + + –

+ + + – – –

+ + + + +

+ + + + + + + Difference

2 7 3 Difference
Two hundred seventy three