Decimal Addition Worksheets
Finding the sum of two decimal values is very similar to working with whole numbers. It is all about focusing on where the decimal point belongs. This is an important skill because it relates directly to finding sum on money since dollars are often represented as the whole number value of a decimal and cents are represented by the decimal portion to the hundredths place. I encourage teachers to first go over adding a whole number value to a decimal value. That approach tends to help students visualize this process a bit better. This selection of worksheets and worksheets helps students learn how to find the sums of decimal values.
Aligned Standard: 6.NS.B.3
- Howling to the Thousandths Step-by-Step Lesson- We find the sum of two decimals to the thousandths place.
- Guided Lesson - Add decimals vertically and horizontally in this sheet and see how to work through these problems.
- Guided Lesson Explanation - Everything here can be solved in three easy steps. That is off course only when we are worried about numbers to the thousandths.
- Decimal Addition (Thousandths) 5 Pack - A great practice pack for those trying to lock down their skills on this topic.
- Practice Worksheet - I realized after doing this page that I could have given you more room. Instead of rewritten it, I just created another 6 pages.
- Matching Worksheet - The sums are found in both directions here.
- Adding and Subtracting Decimals in Columns Worksheet - This is where I played around a bit with adding tenths, hundredths, and thousandths.
- Adding Thousandths Lesson and Practice - We examine the exact nature of carrying the one with decimals.
- Adding Thousandths Practice Worksheet - A well spaced out version of this skill.
- Adding and Subtracting Decimals Horizontally Worksheet - Believe it or not, a very needed skill. Works in sync with adding and subtracting money.
- Equivalent Hundredths Worksheet - The sums are found in both directions here.
- Adding Vertical Decimals Lesson and Practice - We walk you through it and the Dragon too!
- Adding Tenths Worksheet - What sum makes that whole number?
- Adding By Tenths Lesson - Hello, Mister number line! I was wondering when we would see you again.
- Answer Keys - These are for all the unlocked materials above.
I feel that it is very important for students to set up their own problem area with decimals.
- Homework 1 - There is no carrying of numbers in this problem, so everything is very straight forward.
- Homework 2 - Add the digits beginning with the number furthest to the right after the decimal, rename 10 as 1 + 0. Place 1 over the tens and add the carried number over to it.
- Homework 3 - These go out to the thousandths place. We work on adding values in the thousandths.
More of the same, but practice sheet 3 sometimes throws them off with the wording.
- Practice 1 - Now add the digits before the decimal beginning with the ones. Then push your mind to right of the decimal.
- Practice 2 - Add the following 33.333 & 33.333. We could just save time and multiply them.
- Practice 3 - Find the sum of the decimals: 12.173 & 13.219. Set these up vertically.
Math Skill Quizzes
We throw a little sprinkle of algebra in here to cover two standards in one.
- Quiz 1 - Example: 22 + __ = 22.3. What is the missing piece?
- Quiz 2 - Straight up problems to solve. Whole only numbers are in some problems.
- Quiz 3 - Fill in the blanks to complete the equations. This mixs up the other two quizzes.
Tips for Adding Decimals
Learning to add decimals can be a bit tricky at the beginning. It requires careful consideration of the numbers and where the decimal needs to be placed. It is very similar to adding whole numbers, but you just need to pay attention to the decimal point belongs. This comes down to alignment and properly organizing yourself throughout this process.
To learn to add decimals, here are a few tips:
Write the numbers down in a vertical fashion. Each number below the other and all the decimal points lined up. It is important to line up the decimals so that the addition can take place smoothly.
Put in zeros so that the numbers can have the same length. The reason we add extra zeros is that it is an indication that "there is no value at the place of this decimal". For example, In the number 10, it indicates that there is "no ones." by using the zero at the ones place. In number 2.50, it indicates that there are no "no hundredths."
Then comes the main part, addition. Add using the columns, remember to put the decimal points in the answer. Let's learn it using an example: Adding 1.452 to 1.3.
Step 1) Line them up.
Step 2) Fill in zeroes.
Step 3) Add the values form lowest to highest place value. In this case all the decimal places line up, and no carrying is necessary: 2.752 is the end sum.