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

How to Add Decimals?









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

Adding Decimals









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

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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