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 + 0.23b)  0.17 + 1.36 c)  0.076 + 0.61d)  11.56 + 8.072

Solution :

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 – 1.7b)  1 – 0.3 c)  3.2 – 0.65d)  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

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