Operation Odyssey Worksheet
Grade 4 Math Computation Mastery
OPERATION ODYSSEY
Focus: Multi-Digit Addition with Regrouping
Name:
Date: Score:
A
Quick Add Warm-Up (Horizontal Fluency)
-
450 + 380 =
-
1,200 + 4,900 =
-
675 + 25 =
-
8,300 + 700 =
-
3,420 + 580 =
-
999 + 1,001 =
B
Multi-Digit Column Addition (Show Regrouping)
Use boxes above digits for carried values
#7
4,876
+3,458
#8
7,629
+5,894
#9
9,508
+6,793
#10
28,495
+16,748
#11
54,906
+37,894
#12 (3 Addends)
3,214
1,875
+4,650
C
Missing Digit Puzzles (Write the missing number in each box)
#13
3, ? 4 8
+ 2, 5 ? 3
6, 2 2 1
Hundreds Digit:
Tens Digit:
#14
7, 4 ? 9
+ 1, ? 8 4
9, 1 5 3
Tens Digit:
Hundreds Digit:
Operation Odyssey • Grade 4 Mathematics Page 1 of 10 • Addition Mastery
Sub-Zero Lab
SUBTRACTION SUMMIT
Name: Across Zeros & Regrouping
A
Rapid Subtraction Fluency
-
1,000 - 350 =
-
5,000 - 1,200 =
-
4,200 - 800 =
-
8,000 - 450 =
-
6,350 - 2,150 =
-
10,000 - 2,500 =
B
Multi-Digit Subtraction (Decompose & Regroup)
Carefully show place value borrowing
#7
6,432
-2,857
#8
8,045
-3,628
#9 (Across Zeros)
5,000
-2,467
#10 (Across Zeros)
9,004
-4,738
#11
42,315
-18,659
#12 (Across Zeros)
70,000
-34,582
C
Solve & Verify using Addition Check
Step 1: Subtract
7,512
-3,849
➔
Step 2: Check (Add)
Answer
+3,849
Step 1: Subtract
6,003
-2,476
➔
Step 2: Check (Add)
Answer
+2,476
Operation Odyssey • Grade 4 Mathematics Page 2 of 10 • Subtraction Summit
Combo Lab
DUAL OPERATION CLASH
Name:
A
Standard Column Clash (Watch the Signs!)
Pay attention to + and -
#1 (+)
15,384
+27,948
#2 (-)
34,020
-16,845
#3 (+)
62,719
+19,483
#4 (-)
80,005
-43,627
B
Number Sentence Balances (Write <, >, or =)
3,450 + 2,800 Val: _________
9,000 - 2,650 Val: _________
12,400 - 5,900 Val: _________
4,150 + 2,350 Val: _________
7,000 - 1,480 Val: _________
2,850 + 2,670 Val: _________
C
Multi-Step Operation Chains (Calculate in Order)
#8 Operation Sequence:
5,000 + 3,250 ➔ _____ - 1,840 ➔ FINAL
#9 Operation Sequence:
10,000 - 4,600 ➔ _____ + 2,750 ➔ FINAL
Operation Odyssey • Grade 4 Mathematics Page 3 of 10 • Dual Operation Clash
Multiplier 101
MULTIPLICATION LAUNCHPAD
Name: 1-Digit Multipliers
A
Base-10 Multiplication Patterns (Mental Math)
-
6 × 70 =
-
8 × 400 =
-
9 × 3,000 =
-
4 × 50 =
-
7 × 800 =
-
5 × 6,000 =
-
3 × 90 =
-
8 × 800 =
B
Standard Algorithm: 1-Digit × Multi-Digit
Multiply ones, tens, hundreds, thousands
#9
468
×6
#10
725
×8
#11
904
×7
#12
2,349
×4
#13
5,816
×5
#14
6,073
×9
C
Area Model Decomposition (Complete the Boxes & Sum)
#15 Calculate: 6 × 348
Expanded: 6 × (300 + 40 + 8)
6 × 300
1,800
6 × 40
6 × 8
Total Product:
#16 Calculate: 7 × 425
Expanded: 7 × (400 + 20 + 5)
7 × 400
7 × 20
7 × 5
Total Product:
Operation Odyssey • Grade 4 Mathematics Page 4 of 10 • Multiplication Launchpad
Level 4 Target
DOUBLE-DIGIT DUEL
Name: 2-Digit × 2-Digit
A
Area Model Visual Breakdown: 34 × 26
30 × 20 600
4 × 20 80
30 × 6 180
4 × 6 24
Add the 4 Partial Products:
600
+ 180
+ 80
+ 24
884
B
Vertical Standard Algorithm (Show Placeholders)
Remember: Put 0 in the ones place for the second line!
#1
43
×25
#2
56
×34
#3
72
×18
#4
68
×47
#5
84
×52
#6
95
×63
C
Round & Estimate (Round factors to nearest 10)
#7 Estimate: 49 × 31
Rounds to: 50 × 30 =
#8 Estimate: 78 × 62
Rounds to: 80 × 60 =
Operation Odyssey • Grade 4 Mathematics Page 5 of 10 • Double-Digit Duel
Code Breaker
THE SECRET CIPHER
Name:
Mission: Solve each computational problem below. Match each final numerical answer to the cipher key decoder to crack the mystery punchline!
Problem 1
4,520 + 2,130
Letter [ E ]
Problem 2
8,000 - 3,450
Letter [ N ]
Problem 3
250 × 4
Letter [ A ]
Problem 4
12,650 - 4,200
Letter [ T ]
Problem 5
45 × 20
Letter [ L ]
Problem 6
6,789 + 1,211
Letter [ S ]
Problem 7
312 × 5
Letter [ O ]
Problem 8
10,000 - 7,650
Letter [ R ]
Problem 9
54 × 11
Letter [ U ]
Problem 10
3,475 + 3,475
Letter [ C ]
Problem 11
15,000 - 9,800
Letter [ P ]
Problem 12
125 × 8
Letter [ M ]
Decoder Key:
1,000 = A
6,950 = C
6,650 = E
900 = L
1,000 = M*
4,550 = N
1,560 = O
5,200 = P
2,350 = R
8,000 = S
8,450 = T
594 = U
Riddle: What did one calculator say to the other?
#7
#9
CAN
#10
#7
#9
#2
#4
ON
#12
#1
!
Operation Odyssey • Grade 4 Mathematics Page 6 of 10 • Secret Cipher Code Breaker
Sprint Circuit
TRIPLE THREAT FLUENCY MATRIX
Name:
Addition Track 6 Problems
4,328
+1,945
8,754
+6,488
25,690
+18,432
49,058
+37,964
Subtraction Track 6 Problems
5,214
-2,856
7,000
-3,428
31,450
-14,875
80,004
-45,219
Multiplication Track 6 Problems
639
×7
2,415
×4
48
×26
73
×35
Check Your Total Score:
Addition: ___ / 4 Subtraction: ___ / 4 Multiplication: ___ / 4 Total: ___ / 12
Operation Odyssey • Grade 4 Mathematics Page 7 of 10 • Triple Threat Fluency Matrix
Math Detective
THE CALCULATION INSPECTOR
Name:
Task: An incorrect calculation is shown in each box. Find and circle the error in the "Incorrect Work" box, describe what went wrong on the line, and compute the correct answer in the "Correct Solution" box.
Incorrect Work #1
3,874
+ 2,548
5,312
(Forgot carried digits)
Inspector's Diagnosis:
What went wrong?
Correct Solution
3,874
+ 2,548
Incorrect Work #2
6,000
- 2,347
4,347
(Subtracted 0 from digit)
Inspector's Diagnosis:
What went wrong?
Correct Solution
6,000
- 2,347
Incorrect Work #3
36
× 24
144
+ 72
216
(Missing tens zero!)
Inspector's Diagnosis:
What went wrong?
Correct Solution
36
× 24
Operation Odyssey • Grade 4 Mathematics Page 8 of 10 • Error Analysis & Correction
Logic Grid
FUNCTION MACHINES & PUZZLES
Name:
A
Input-Output Function Machines
Rule: + 675
| IN | OUT |
|---|
| 1,250 | 1,925 |
| 2,480 | |
| 4,075 | |
| 6,950 | |
Rule: - 450
| IN | OUT |
|---|
| 1,000 | 550 |
| 2,300 | |
| 5,025 | |
| 8,150 | |
Rule: × 8
B
Cross-Math Grids (Rows & Columns Must Calculate Accurately)
Grid 1: Operations Across & Down
1,200
850
=
_____
2,400
1,150
=
_____
=
=
=
_____
_____
=
_____
Grid 2: Multiplication Product Grid
×
30
45
120
6
180
____
____
12
____
____
____
25
____
____
____
Operation Odyssey • Grade 4 Mathematics Page 9 of 10 • Function Machines & Cross-Math Grids
Milestone Assessment
THE GRAND MASTER CHALLENGE
Student Name:
Mastery Score: / 12
Final Mixed Computational Mastery: Demonstrate precision across multi-digit addition, subtraction across zeros, and multi-digit multiplication.
1 Section I: Addition Mastery
#1
7,489
+ 5,836
#2
24,675
+ 18,948
#3
63,094
+ 29,857
#4 (3 Addends)
4,215
3,890
+ 1,475
2 Section II: Subtraction Mastery
#5
8,312
- 3,758
#6 (Across Zeros)
6,000
- 2,483
#7
45,020
- 18,674
#8 (Across Zeros)
90,000
- 43,825
3 Section III: Multiplication Mastery
#9 (1-Digit)
847
× 6
#10 (4-Digit)
3,209
× 7
#11 (2-Digit)
54
× 38
#12 (2-Digit)
86
× 47
Student Reflection:
Addition Expert Subtraction Master Multiplication Pro
Teacher Stamp / Signature:
Operation Odyssey • Grade 4 Mathematics Page 10 of 10 • Grand Master Challenge
