Regroup Radar Worksheet
REGROUP RADAR
3- & 4-Digit Subtraction Practice • Grade 5
Name:
Date:
Focus: Standard algorithm with 3- and 4-digit numbers; show all regrouping trades. Part A: 6 Problems • Part B: 2 Word Problems
Part A
Standard Algorithm
Subtract. Use the regrouping boxes to record trades.
1
ThHTO
•854
−
•328
2
ThHTO
•605
−
•247
3
ThHTO
3745
−
1429
4
ThHTO
5236
−
2478
5
ThHTO
4008
−
1635
6
ThHTO
7150
−
3486
Part B
Word Problems
Set up the vertical algorithm and show all work.
7
The fifth-grade community service club set a goal to collect 4,500 canned goods for the regional food pantry. By the third week, they had collected 2,865 cans. How many more canned goods must they collect to reach their goal?
Work Space (Set up vertically):
Final Answer:
Answer:
cans
8
A passenger airplane is scheduled to fly 3,124 miles from Seattle to Miami. After two hours of flight time, the captain announces that they have covered 1,758 miles. How many miles remain on the flight?
Work Space (Set up vertically):
Final Answer:
Answer:
miles
Regroup Radar Answer Key
REGROUP RADAR
Answer Key
Teacher Reference & Pullout Intervention Notes
Instructional Target 3- & 4-Digit Multi-Regrouping
Pullout Focus: On problems 4, 5, and 6, ensure students trade step-by-step from left to right when regrouping across zeros or multiple columns.
Part A
Standard Algorithm Solutions
Rose numbers indicate regrouping values
1 Regroup Ones (14)
—
—
4
14
• 8 5 4
−
• 3 2 8
5 2 6
2 Across Zero
—
5
9
15
• 6 0 5
−
• 2 4 7
3 5 8
3 Regroup Ones (15)
—
—
3
15
3 7 4 5
−
1 4 2 9
2, 3 1 6
4 Multiple Regroups
4
11
12
16
5 2 3 6
−
2 4 7 8
2, 7 5 8
5 Across Two Zeros
3
9
10
—
4 0 0 8
−
1 6 3 5
2, 3 7 3
6 All 4 Columns
6
10
14
10
7 1 5 0
−
3 4 8 6
3, 6 6 4
Part B
Word Problem Solutions
Complete regrouping steps & vertical alignment
7
Goal: 4,500 cans. Collected: 2,865 cans. Difference needed:
Regrouping Steps: • Trade from 5 hundreds → tens has 9, ones has 10 • Ones: \(10 - 5 = 5\) • Tens: \(9 - 6 = 3\) • Trade 1 thousand → hundreds has 14: \(14 - 8 = 6\) • Thousands: \(3 - 2 = 1\)
3 14 9 10
4, 5 0 0
− 2, 8 6 5
1, 6 3 5
Correct Answer:
Answer: 1,635
cans
8
Total distance: 3,124 miles. Flown: 1,758 miles. Remaining distance:
Regrouping Steps: • Ones: borrow from 2 tens (becomes 1) → \(14 - 8 = 6\) • Tens: borrow from 1 hundred (becomes 0) → \(11 - 5 = 6\) • Hundreds: borrow from 3 thousands (becomes 2) → \(10 - 7 = 3\) • Thousands: \(2 - 1 = 1\)
2 10 11 14
3, 1 2 4
− 1, 7 5 8
1, 3 6 6
Correct Answer:
Answer: 1,366
miles
