ADDING AND SUBTRACTING DECIMALS WORKSHEET

Problem 1 :

Add the following decimal numbers :

1.23, 0.59, 3.76

Problem 2 :

Subtract 2.56 from 3.79.

Problem 3 :

Add the following decimal numbers :

28.07, 7.6, 0.008

Problem 4 :

Add the following decimal numbers :

14.2, 16, 0.542

Problem 5 :

Add the following decimal numbers :

10.653, 0.065, 3

Problem 6 :

Add the following decimal numbers :

38.056, 24.6, 32

Problem 7 :

Subtract 13.49 from 29.84.

Problem 8 :

Subtract 25.57 from 48.05.

Problem 9 :

Subtract 6.59 from 18.

Problem 10 :

Subtract 3.541 from 8.933.

Problem 11 :

James placed an order for a drum set priced at $81.56 and an electronic organ for $56.74. How much does James have to pay in total once he receives the items?

Problem 12 :

A, B and C are three cities are located as shown below. Distance between the cities A and C is 75.89 miles and distance between the cities B and C is 34.56 miles. Find the distance between the cities A and B.

Answers

1. Answer :

= 1.23 + 0.59 + 3.76

Therefore,

1.23 + 0.59 + 3.76 = 5.58

2. Answer :

= 3.79 - 2.56

Therefore,

3.79 - 2.56 = 1.23

3. Answer :

= 28.07 + 7.6 + 0.008

In the above addition of decimal numbers, we have to take 7.6 as 7.600 and 28.07 as 28.070. Because the last decimal number has 3 digits to the right of the decimal point.

Therefore,

28.07, 7.6, 0.008 = 35.678

4. Answer :

= 14.2 + 16 + 0.542

In the above addition of decimal numbers, we have to take 14.2 as 14.200 and 16 as 16.000. Because the last number has 3 digits to the right of the decimal point.

Therefore,

14.2 + 16 + 0.542 = 30.742

5. Answer :

= 10.653 + 0.065 + 3

In the above addition of decimal numbers, we have to take 3 as 3.000. Because, both the first and second numbers have 3 digits to the right of the decimal point.

Therefore,

10.653 + 0.065 + 3 = 13.718

6. Answer :

= 38.056 + 24.6 + 32

In the given decimal numbers, the first number 38.056 has more number of digits to the right of the decimal point, that is 3.

So, each of the other numbers must have the same number digits to the right of the decimal point, that is 3.

We have to take 24.6 as 24.600 and 39 as 39.000.

Therefore,

38.056 + 24.6 + 32 = 94.656

7. Answer :

= 29.84 - 13.49

Consider the digits at hundredths place.

Since 4 is smaller than 9, we can not subtract 9 from 4.

So, borrow 1 from the preceding number 8 and take that 1 in front of 4. Then, 4 will become 14.

Now, subtract the numbers as shown below.

Therefore,

29.84 - 13.49 = 16.35

8. Answer :

= 48.05 - 25.57

Consider the digits at hundredths place.

Since 5 is smaller than 7, we can not subtract 7 from 5.

And also, we can not borrow from 1 from the preceding number of 5 in 48.05. Because, it is zero.

So, borrow 1 from 8 at ones place in 48.05 and take that 1 in front of 0. Then, 0 will become 10.

Subtract 1 from 10 and take that 1 in front of 5. Then, it will become 15.

Now, subtract the numbers as shown below.

Therefore,

48.05 - 25.57 = 22.48

9. Answer :

= 18 - 6.59

In the subtraction of the decimal numbers above, we have to take 18 as 18.00. Because, the second decimal number has 2 digits to the right of the decimal point.