Adding and Subtracting�Decimals�
Adding Decimals Rules to Follow
Remember to line up your �decimals when adding.
Bring down your �decimal to the sum.
Always write a number sentence vertically
When adding, bring the decimal down in the sum (total)
Remember to line up your decimals
Add zeroes or “x” as placeholder or value
Apply whole number addition rules
51.37
+ 24.50
Addition Example:
Line up your decimals!
5.25 + 2.5 =
Let’s work it out together!
Solving for Addition:
The “X” represents zero �place holder or value.
5.25
+2.5X
7
.7
5
Remember to line up your decimals when adding.
Practice: Your Turn
5.891 + 3.25 =
Solve the problem below. Remember to �line up your decimal points when trying to solve.
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Start
Let’s share out and solve!
Line up your decimal points!
Remember to place a zero� or x as a placeholder.
5.891
+3.250
9
.1
4
1
We are adding the following: 5.891 + 3.25
Subtraction Decimal Rules to Follow
Remember to bring the decimal down to find the difference
Write number sentence vertically
Line up the decimals
Insert zeroes or “x” for placeholder or value
Follow whole number subtraction rules
6.251– 5.15 =
Practice: Your Turn
6.251- 5.15 =
Let’s work it out together!
Solving for Subtraction
Remember to use a zero or �“x” as a placeholder or value.
6.251
-5.150
Remember to line up your decimals.
1
.1
0
1
Practice: Your Turn
Add a zero or “x” as �a placeholder
45.6
-21.58 =
Solve the problem below. Remember to line up your decimal points when trying to solve.
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Let’s share out and solve!
Add a zero or “x” as �a placeholder
45.60
-21.58
Solve the problem below. Remember to line up your decimal points when trying to solve.
24.02