# Subtracting decimals #### Everything You Need in One Place

Homework problems? Exam preparation? Trying to grasp a concept or just brushing up the basics? Our extensive help & practice library have got you covered. #### Learn and Practice With Ease

Our proven video lessons ease you through problems quickly, and you get tonnes of friendly practice on questions that trip students up on tests and finals. #### Instant and Unlimited Help

Our personalized learning platform enables you to instantly find the exact walkthrough to your specific type of question. Activate unlimited help now!

0/1
##### Intros
###### Lessons
1. Introduction to Subtracting Decimals:
How to subtract decimals with base ten (block) models
0/15
##### Examples
###### Lessons
1. Exchanging practice for decimals with block models
Practice exchanging to make more smaller place values. Use base ten (block) models to help.
1. 4 ones + 6 tenths = ___ ones + ___ tenths 2. Exchange 1 one for 10 tenths:
8 tens + 0 ones + 3 tenths = ___ tens + ___ ones + ___ tenths 3. Exchange 1 tenth for 10 hundredths:
9 tenths + 1 hundredth = ___ tenths + ___ hundredths 4. Exchange 1 tenth for 10 hundredths:
2 ones + 0 tenths + 7 hundredths = ___ ones + ___ tenths + ___ hundredths 2. Subtracting decimal block models
Subtract the decimal block models. Give the answer in standard form.
1. 2. 3. 4. 3. Subtracting decimals on a grid
Subtract the decimals by lining up on the grid.
1. 18.7 - 2.3 2. 57.98 - 8 3. 9.2 - 5.4 4. 78.03 - 9.56 4. Subtracting decimals and rounding decimal differences
1. 41.2 - 8.43
2. 62.04 - 31.03
3. 675.92 - 324.7
0%
##### Practice
###### Topic Notes

In this lesson, we will learn:

• How to subtract decimal numbers using base ten (block) models
• That subtracting decimal numbers is the same as subtracting whole numbers, which involves lining up the right place values and exchanging

Notes:

• To subtract decimals with base ten (block) models:
• Remember the three types of blocks used to represent the ones, tenths, and hundredths place values
• "One whole" or hundred block = ones place value
• Column (stick or rod) = tenths place value
• Single square = hundredths place value • A subtraction statement is made of: minuend - subtrahend = difference
• Cross out the blocks that you are subtracting (subtrahend from the minuend), until you've crossed out all matching pairs (subtrahend all crossed out).
• Exchange (or "borrow") from a bigger block if you don't have enough blocks to cross out. One big block can be split into 10 of the next smaller type of block (next place value). • To subtract decimals, line up the decimal point to make sure you are adding the right place values in the same columns. Exchange (borrow) whenever necessary.
• Sometimes, you will have to write one or more extra zeroes to a number after the decimal point (trailing zeroes) when the minuend/subtrahend don't have the same number of place values.