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 :
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
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