Math Drills

Adding and Subtracting Decimals Review

F-4

Word Problems (Addition)

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What this worksheet covers

Grade: Grade 4 (Elementary School)
Topic: Adding and Subtracting Decimals

The structure of decimals, down to the tenths, hundredths and thousandths place, is grasped through Place Value and Definition, Comparing Sizes and Number Line. Addition and subtraction follow in column and horizontal form, extending to sums and differences of three numbers and to Removing Trailing Zeros.

Where the two numbers have different numbers of decimal places, the standard error in subtraction is copying the digit above straight down rather than filling the empty place with 0. An answer of 2.44 for 3.6 - 1.24 means the 4 in the hundredths place was copied down. Finishing without writing the decimal point, as though the answer were a whole number, also persists.

The number of decimal places in play widens sharply here. Decimals in grade 3 stopped at a single carry, but this unit reaches the thousandths place and pairs numbers with different digit counts against each other. Lining up the decimal point to add or subtract carries forward as the key to placing it correctly once Multiplying and Dividing Decimals begins.

Addition · Word Problems3 questions
Subtraction · Word Problems3 questions

Questions & answers

Problems and answers on this worksheet

These are the problems in “Adding and Subtracting Decimals”, shown with their answers.

(1)On the morning of the field trip, there was 7.49L of water in Grace's bucket. When she adds 2.6L more, how many L of water are there? Answer □
Answer: 10.09L
(2)During arts and crafts time, Henry cut off 1.13m of wire. When he joined on 0.65m more wire, how many m were there in all? Answer □
Answer: 1.78m
(3)At the schoolyard, Noah had 2.3m of rope. When he joins 1.45m more of rope, how many m will there be in total? Answer □
Answer: 3.75m
(4)At the cake shop, Alex prepared milk of 3.68L. After using 1.24L in the dough, how many L will be left? Answer □
Answer: 2.44L
(5)In the morning, Sam checked the milk in the refrigerator and found 6.93L. His family drank 1.06L. How many L are left? Answer □
Answer: 5.87L
(6)The distance from school to the station is 7.4km. Noah has traveled 3.86km so far. How much is left, in how many km? Answer □
Answer: 3.54km

What to do next

Structure of DecimalsStructure of Decimals Reading (Place Value)

Next unit: Division by 2-Digit Numbers

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