Page 51 - Start Up Mathematics_3

Th H T O
9 Step 2: Subtract the remaining tens.

6 1 2 10 0 15 5 9 – 2 = 7
– 3 9 2 6

7 9

Th H T O
11 9 Step 3: Subtract the remaining hundreds. 9 being
5 1 10 15 bigger than 1 cannot be subtracted.
6 2 0 5
Borrow 1 thousand from the thousands
– 3 9 2 6
place and add it to 1 hundred.
2 7 9 10 hundreds + 1 hundred = 11 hundreds

11 is bigger than 9, so now we can
subtract.

11 – 9 = 2
Th H T O

11 9 Step 4: Subtract the remaining thousands.
5 6 1 2 10 0 15 5 5 – 3 = 2

– 3 9 2 6

2 2 7 9

So, 6205 – 3926 = 2279.

Example 4: Subtract 4718 from 7320.

Solution: Th H T O Mental Maths
6 13 1 10 Solve mentally.
7 3 2 0
(a) 8050 – 6005 = ?
– 4 7 1 8
(b) 9009 – 5005 = ?
2 6 0 2

So, 7320 – 4718 = 2602.

A Challenge!
Th H T O

8 1 5 0
Find the mistake in this
problem. – 6 0 5 5
2 0 0 5

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