Decimal Power Skill Worksheet
Skill 01 Tiered IEP Support
Adding Decimals
Name:
Date:
Golden Rule: Line Up the Decimal Points!
1 Stack by decimal point
2 Fill empty spots with 0
3 Add right to left
4 Drop point straight down
Level 1: Guided Example Problem: \( 3.45 + 2.18 \)
Pre-Aligned Place Value
Tens Ones • Tenths Hund.
1
- 3 • 4 5
•
A. Hundredths: \( 5 + 8 = 13 \). Write 3, regroup 1 to Ones.
B. Tenths: \( 4 + 1 = 5 \).
C. Bring decimal • straight down.
D. Ones: \( 1 + 3 + 2 = 6 \).
Level 2: Supported Practice Problem: \( 14.6 + 3.25 \)
Add 0 to hold place
Tens Ones • Tenths Hund.
1 4 • 6 0
•
Checklist:
Points lined up Filled empty spot with 0 Added right to left Dropped point down
Level 3: Setup & Solve Problem: \( 8.75 + 6.49 \)
Stack numbers inside grid
Tens Ones • Tenths Hund.
•
•
•
Self-Monitoring:
1. 8 in Ones, 75 in tenths/hundredths.
2. 6 in Ones, 49 in tenths/hundredths.
3. Check: Did you drop down the decimal point?
Page Check: All decimal points lined up Checked my work
Page 1 of 3 • Addition
Skill 02 Tiered IEP Support
Subtracting Decimals
Name:
Date:
Golden Rule: Line Up Decimals & Annex Zeros Before Regrouping!
1 Line up points
2 Add 0 to top if empty
3 Borrow if top is smaller
4 Drop point straight down
Level 1: Basic Subtraction Problem: \( 7.68 - 3.24 \)
No Regrouping Needed
Ones • Tenths Hund.
7 • 6 8
- 3
• 2 4
•
A. Hundredths: \( 8 - 4 = \text{___} \)
B. Tenths: \( 6 - 2 = \text{___} \)
C. Bring decimal • straight down!
D. Ones: \( 7 - 3 = \text{___} \)
Level 2: Borrowing with Zero Problem: \( 9.4 - 3.27 \)
Must add placeholder 0!
Ones • Tenths Hund.
3
10
9 • 4 0
- 3
• 2 7
•
Look Closely:
1. You cannot do \( 0 - 7 \).
2. Borrow 1 from 4 tenths (becomes 3).
3. The 0 hundredths becomes 10.
4. Now subtract: \( 10 - 7 = \text{___} \).
Level 3: Setup & Regroup Problem: \( 12.52 - 6.38 \)
Borrow from tenths
Tens Ones • Tenths Hund.
1 2 • 5 2
- 6 • 3 8
•
Checklist: Regrouped 5 into 4 tenths Changed 2 into 12 hundredths Dropped decimal straight down
Page Check: Added placeholder zeros where needed Regrouped correctly
Page 2 of 3 • Subtraction
Skill 03 Tiered IEP Support
Multiplying Decimals
Name:
Date:
Golden Rule: Multiply Like Whole Numbers, Then Count the Decimal Jumps!
1 Multiply normally (ignore dots first)
2 Count total decimal digits in both
3 Jump decimal left into answer!
Level 1: 1-Digit Multiplier Problem: \( 3.4 \times 2 \)
Jump Visualizer
3.4 1 place
×2 0 places
•
= 1 jump!
Step 1: Multiply: \( 34 \times 2 = 68 \).
Step 2: Total decimal places = 1.
Step 3: Jump 1 spot left from 68: \( 6.8 \).
Level 2: Supported Practice Problem: \( 2.15 \times 3 \)
2 decimal places
2.15 [ 2 ] places
×3 [ 0 ] places
•
= 2 jumps!
Guided Steps:
• \( 3 \times 5 = 15 \) (write 5, carry 1)
• \( 3 \times 1 = 3 + 1 = 4 \)
• \( 3 \times 2 = 6 \)
Jump 2 times from right to left!
Level 3: Decimal × Decimal Problem: \( 1.4 \times 0.6 \)
Count both numbers!
1.4 [ 1 ] place
×0.6 [ 1 ] place
0 •
Total: 2 jumps
Decimal Jump Math:
1. Multiply: \( 14 \times 6 = 84 \)
2. First number: 1 decimal place
3. Second number: 1 decimal place
1 + 1 = 2 total jumps to the left!
Page Check: Multiplied accurately Counted decimal jumps correctly
Page 3 of 3 • Multiplication
