Read the questions given in the word problems on addition and subtraction of decimals to do the needful as required. We know we need to add or subtract the decimals as we add or subtract ordinary numbers.
Let us consider some of the following examples.
1. Kate had $ 368.29. Her mother gave her $ 253.46 and her sister gave her $ 57.39. How much money does she has now?
Money Kate had = $ 368.29
Money gave her mother = $ 253.46
Money gave her sister = + $ 57.39
Total money she has now = $ 679.14
2. Maria had $ 469.38. She gave $ 99.37 to Mike and $ 124.93 to Kerry. How much money is left with her?
The amount given to Mike = $ 99.37
The amount given to Kerry = + $ 124.93
Total amount given = $ 224.30
The amount Maria had = $ 469.38
The amount she gave = - $ 224.30
The amount left with Maria = $ 245.08
3. The sum of three decimals is 496.28. Two decimals are 238.94 and 110.09. Find the third decimal.
One decimal = 238.94
Another decimal = + 110.09
The sum of two decimals = 349.03
The sum of three decimals = 496.28
The sum of two decimals = - 349.03
The third decimal = 147.25