We will discuss here how to solve the word problems on addition of decimal fractions.
We know to add two or more decimals:
(i) Convert all the decimals to be added into like decimals.
(ii) Write the decimals in column in such a way that the decimal pints of all the decimals are in the same column and the digits having the same place values are in the same column.
(iii) Add the decimal ignoring the decimal points.
(iv) Put the decimal point in the sum directly under the decimal points of all the decimals.
Solved examples on word problems
on addition of decimal fractions:
1. Find the sum of 12.279, 3.00046 and 742.000372.
12.279000
3.000460
+ 742.000372
757.279832
2. The rain fall in a city during the months of July, August and September were 9.82 cm, 5.24 cm and 2.32 cm respectively. Find the total rainfall during three months.
Rainfall in July = 9.82 cm
Rainfall in August = 5.24 cm
Rainfall in September = + 2.32 cm
Therefore total rainfall = 17.38 cm
3. Mike walked 14.5 km on Monday, 12.75 km on Tuesday, 15.8 km on Wednesday and 18.6 km on Thursday. How many kilometres did Mahesh walk in 4 days?
Mike walked on
Mike walked on Monday = 14.50 km
Mike walked on Tuesday = 12.75 km
Mike walked on Wednesday = 15.80 km
Mike walked on Thursday = + 18.60 km
Therefore, total distance walked in four days = 61.65 km
`● Decimal.
Expanded form of Decimal Fractions.
Changing Unlike to Like Decimal Fractions.
Comparison of Decimal Fractions.
Conversion of a Decimal Fraction into a Fractional Number.
Conversion of Fractions to Decimals Numbers.
Addition of Decimal Fractions.
Problems on Addition of Decimal Fractions
Subtraction of Decimal Fractions.
Problems on Subtraction of Decimal Fractions
Multiplication of a Decimal Numbers.
Multiplication of a Decimal by a Decimal.
Properties of Multiplication of Decimal Numbers.
Problems on Multiplication of Decimal Fractions
Division of a Decimal by a Whole Number.
Division of Decimal Fractions by Multiples.
Division of a Decimal by a Decimal.
Division of a whole number by a Decimal.
Properties of Division of Decimal Numbers
Problems on Division of Decimal Fractions
Conversion of fraction to Decimal Fraction.
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