ADDING AND SUBTRACTING DECIMALS

Adding and Subtracting Decimals :

Step 1 :

Arrange the digits of the decimals according to their place values in the vertical column.

Step 2 :

Add zero in the empty space of decimals on the right if needed.

Step 3 :

Add the digits from right to left, if there is any carry over digit, remember to add it.
Subtract the digits from right to left, if we borrow from the left of digit, remember to less it.

Find :

Problem 1 :

a) 0.8 + 0.23

b) 0.17 + 1.36

c) 0.076 + 0.61

d) 11.56 + 8.072

Solution :

Add :

Problem 2 :

a) 38.76, 132.8 and 9.072

b) 18.61, 236.9 and 1072.4

Solution :

Find :

Problem 3 :

a) 2.6 – 1.7

b) 1 – 0.3

c) 3.2 – 0.65

d) 1.00 – 0.99

Solution :

Subtract :

Problem 4 :

a) 8.615 from 19.837

b) 14.86 from 28.79

Solution :

Problem 5 :

A 20 m length of rope is cut into 4 pieces. Three of the pieces have lengths 5.62 m, 8.05 m, and 2.6 m. Find the Length of the fourth pieces.

Solution :

Given,

The length of the rope is 20 m and it is cut into four pieces.

Length of first piece = 5.62 m

Length of second piece = 8.05 m

Length of third piece = 2.6 m

Let the length of the fourth piece be x.

Length of rope = Sum of the length of four pieces

20 = 5.62 + 8.05 + 2.6 + x

20 = 16.27 + x

20 - 16.27 = x

3.73 = x

So, the length of the fourth piece is 3.73 m.

Problem 6 :

A weightlifter snatches 135.8 kg, 142.9 kg, and 153.7 kg in consecutive lifts. Find the total mass lifted.

Solution :

Total lifted weight = Sum of his each consecutive lifted weights

= 135.8 + 142.9 + 153.7

= 432.4 kg

ADDING AND SUBTRACTING DECIMALS

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