Adding Decimals

Adding decimals is just same like adding as usual.

How to add decimal number?

To add decimal follow the below steps:

● Write down the decimal numbers, one number under the other number and line up the decimal points.

● Convert the given decimals to like decimals.

● Arrange the addends in such a way that the digits of the same place are in the same column.

● Add the numbers from right as we carry addition usually.

● Remember to place the decimal point down in the answer in the same place as the numbers above it.

Worked-out problems to find the sum of the decimal numbers:

Read the above explanation step-by-step and try to understand the examples on addition of decimals.

1. Add the decimals:

(i) 1.83, 21.105, 236.8 and 0.9

Solution:

We have 1.83 + 21.105 + 236.8 + 0.9

Converting all the addends to like decimals

1.830 + 21.105 + 236.800 + 0.900

Arranging the addends in columns and on adding we get

Answer: 260.635

(ii) 7.39, 65.007, 213.8 and 91.2

Solution:

We have 7.39 + 65.007 + 213.8 + 91.2

Converting all the addends to like decimals

7.390 + 65.007 + 213.800 + 91.200

Arranging the addends in columns and on adding we get

Answer: 377.397

Word problems on adding decimals:

2. Terry spent $33 and 65 cents on Monday, $21 on Tuesday and $9 and 7 cents on Wednesday. Find the total money spent by her in three days altogether.

Solution:

Terry spent on Monday = $43 and 65 cents                                = $33.65

She spent on Tuesday = $21                                                   = $21.00

She spent on Wednesday = $9 and 5 cents                                =  $9.07

Therefore, total amount spent by Terry = $(33.65 + 21.00 + 9.07) = $63.72

3. First number is 85.99, second number is 107.81 and the third number is 19.207. Find the sum of the three numbers.

Solution:

First number = 85.99

Second number = 107.81

Third number = 19.207

Therefore, sum of three numbers = (85.99 + 107.81 + 19.207) = 213.007

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● Related Concept

● Decimals

● Decimal Numbers

● Decimal Fractions

● Like and Unlike Decimals

● Comparing Decimals

● Decimal Places

● Conversion of Unlike Decimals to Like Decimals

● Decimal and Fractional Expansion

● Terminating Decimal

● Non-Terminating Decimal

● Converting Decimals to Fractions

● Converting Fractions to Decimals

● H.C.F. and L.C.M. of Decimals

● Repeating or Recurring Decimal

● Pure Recurring Decimal

● Mixed Recurring Decimal

● BODMAS Rule

● BODMAS/PEMDAS Rules - Involving Decimals

● PEMDAS Rules - Involving Integers

● PEMDAS Rules - Involving Decimals

● PEMDAS Rule

● BODMAS Rules - Involving Integers

● Conversion of Pure Recurring Decimal into Vulgar Fraction

● Conversion of Mixed Recurring Decimals into Vulgar Fractions

● Simplification of Decimal

● Rounding Decimals

● Rounding Decimals to the Nearest Whole Number

● Rounding Decimals to the Nearest Tenths

● Rounding Decimals to the Nearest Hundredths

● Round a Decimal

● Adding Decimals

● Subtracting Decimals

● Simplify Decimals Involving Addition and Subtraction Decimals

● Multiplying Decimal by a Decimal Number

● Multiplying Decimal by a Whole Number

● Dividing Decimal by a Whole Number

● Dividing Decimal by a Decimal Number

7th Grade Math Problems

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