Page 18 - SM Class 5 Inner.cdr

j. 3 7 6 5 9 4 0 k. 5 3 6 2 1 2 8 l. 5 9 1 0 4 1 7

+ 8 2 1 4 5 5 6 + 5 6 3 2 1 3 8 + 6 2 1 4 7 3 2 9

2. Write in columns and add :
a. 472956 and 262450 b. 310572 and 576296

c. 476531 and 163275 d. 256879 and 632957
e. 350072, 12350 and 157023 f. 198765, 500321 and 14056

3. Find the missing digits :

a. b.
5 0 7 0 8 0 0 4 9 0 7 0 1 0 0 6

+ 0 7 8 0 0 7 2 0 + 0 4 6 0 9 0 9 7 0
8 1 0 7 3 8 0 0 2 0 0 7 0 0 5 2 2

Subtraction

Subtraction of whole numbers is quite similar as we have done in previous

classes :
We arrange the given numbers in columns, ones under ones, tens under tens,
hundred under hundreds and so on.

Beginning with the ones, we go on subtracting column wise, borrowing if
necessary, from the next column to the left.

Example 6 : Subtract 2478652 from 8364579.

Solution : TL L TthTh H T O
7 12 15 13 15
8 3 6 4 5 7 9 Mineud
– 2 4 7 8 6 5 2 Subtrahend

5 8 8 5 9 2 7 Difference

Properties of Subtraction
1. The order of numbers involved in a subtraction cannot be changed.

For example : 42146 – 12649 is not equal to 12649 – 42146
2. When the minuend and the subtrahend are the same, the difference is zero.

For example : 8,55,341 – 8,55,341 = 0
3. When zero is subtracted from a number, the difference is the number itself.

For example : 9,45,253 – 0 = 9,45,253

18
Mathematics In Focus - 5