Page 50 - Start Up Mathematics_3
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Th H T O
14 11 Step 3: Subtract the remaining hundreds. 6 being
5 4 1 14 bigger than 4 cannot be subtracted.
6 5 2 4
Borrow 1 thousand from the thousands
– 4 6 8 7
place and add it to 4 hundreds.
8 3 7
10 hundreds + 4 hundreds = 14 hundreds
14 is bigger than 6, so now we can subtract.
14 – 6 = 8
Th H T O
14 11 Step 4: Subtract the remaining thousands.
5 4 1 14
6 5 2 4 5 – 4 = 1
– 4 6 8 7
1 8 3 7
So, 6524 – 4687 = 1837.
In other words, the difference between 6524 and 4687 is 1837.
Example 3: Find the difference between 3926 and 6205.
Solution:
Th H T O
1 10 9 15 Step 1: Subtract the ones.
6 2 0 5 But 5 – 6 is not possible.
– 3 9 2 6
9
(a) We need to borrow 1 ten from the tens place. But in the tens place
we have 0. So, we cannot borrow 1.
(b) We now move to the hundreds place. There is 2 in the hundreds
place. So, we borrow 1 hundred from the hundreds place and add
it to 0 tens.
10 tens + 0 tens = 10 tens.
(c) We borrow 1 ten from the tens place and add it to 5 ones.
10 ones + 5 ones = 15 ones
Subtract 15 – 6 = 9.
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