2 9 4
+5 7 8
8 7 2
4. With Zero
8 9 14
9 0 4
−5 6 8
3 3 6
C
Step 1: Marcus's Total
285 + 348 = 633 cans
Combine Monday & Tuesday collections.
Step 2: Comparison (Subtract)
633 − 196 = 437 cans
Subtract sister's total from Marcus's combined total.
Correct Final Answer: 437 more cans
Rounding Benchmark Note (195): Rounding 195 to nearest 10 is tricky for students because the 9 tens becomes 10 tens, rolling over to 200. Praise students who identify this ripple effect!
Daily Math Missions • Grade 3 Review Packet
Answer Key • Day 3
Teacher Reference
A
Round to nearest 10:
761 → 760 (ones digit 1 < 5)
408 → 410 (ones digit 8 ≥ 5)
635 → 640 (ones digit 5 rounds up)
Round to nearest 100:
174 → 200 (tens digit 7 ≥ 5)
550 → 600 (tens digit 5 rounds up)
719 → 700 (tens digit 1 < 5)
B
1. Addition
1 1
5 4 9
+3 8 6
9 3 5
2. Across Zeros
6 9 10
7 0 0
−3 6 4
3 3 6
3. Addition
1 1
4 7 8
+2 6 5
7 4 3
4. Subtraction
7 12 11
8 3 1
−4 7 5
3 5 6
C
Step 1: Total Apples Taken
235 + 148 = 383 apples
(Alt: 520 − 235 = 285 apples left after farm stand)
Step 2: Remaining Apples
520 − 383 = 137 apples
(Alt: 285 − 148 = 137 apples left)
Correct Final Answer: 137 apples left
Two Valid Problem Paths: Accept either method: adding both deductions together first (235 + 148 = 383, then 520 − 383) OR subtracting sequentially (520 − 235 = 285, then 285 − 148 = 137). Both demonstrate mathematical mastery.
Daily Math Missions • Grade 3 Review Packet
Answer Key • Day 4
Teacher Reference
A
Round to nearest 10:
283 → 280 (ones digit 3 < 5)
746 → 750 (ones digit 6 ≥ 5)
915 → 920 (ones digit 5 rounds up)
Round to nearest 100:
462 → 500 (tens digit 6 ≥ 5)
825 → 800 (tens digit 2 < 5)
350 → 400 (tens digit 5 rounds up)
B
1. Addition
1 1
6 3 8
+2 9 7
9 3 5
2. Subtraction
7 14 12
8 5 2
−4 8 9
3 6 3
3. Addition
1 1
3 7 9
+4 8 6
8 6 5
4. Across Zeros
8 9 10
9 0 0
−5 4 7
3 5 3
C
Step 1: Student Total
$348 + $417 = $765
Sum of Grade 3 and Grade 4 collections.
Step 2: Add Principal Bonus
$765 + $175 = $940
Add the $175 school match to find grand total.
Correct Final Answer: $940 total raised
Weekly Formative Assessment: Students who scored 8/10 or higher across all 4 days have achieved solid fluency in 3-digit regrouping and place value rounding up to 999. Use Friday's check-boxes for quick student self-monitoring conferences.
Daily Math Missions • Grade 3 Review Packet
