Page 104 - Maths Class 05

2. Solve.

a. 24.11 + 6.9 b. 5.82 + 3.8 c. 7 + 1.7
d. 153.2 + 15.34 e. 236.5 + 35.6 f. 15.01 + 17.1

g. 18.2 + 12.2 + 0.4 h. 2.4 + 19.28 i. 0.2 + 9 + 12.20

3. Find the perimeter of the adjoining figure.

5.86 cm

4.7 cm 4.2 cm

Subtraction of Decimals 13.43 cm

Subtraction of decimals is carried out in a similar way. We line up the decimals
vertically, take extra zeros to the right and subtract downward.

Following are the steps for subtraction of decimals:

Step 1 : Convert to like decimals.

Step 2 : Line up the decimal points.
Step 3 : Subtract in each place value.

Step 4 : Regroup wherever necessary.

Example : Subtract 14.214 from 34.91.

Solution : Subtracting decimal numbers is just like subtracting whole numbers.

Step 1 : Write the bigger number on top and the
3 4 . 9 1
smaller one below such that the decimal
– 1 4 . 2 1 4
points are in the same column and the
digits having the same place values are

in the same column.
3 4 . 9 1 0
Step 2 : Convert them into like decimals.
– 1 4 . 2 1 4
Step 3 : Subtract the numbers.

Step 4 : Put the decimal point in the result

directly under the decimal points of the
3 4 . 9 1 0
given decimals.
– 1 4 . 2 1 4
\ 34.91 – 14.214 = 20.696
2 0 . 6 9 6

Mathematics-5 104