4
5
3
Problem 8: 2-Digit Subtraction (95 − 61 = 34)
9
5
−
6
1
3
4
Problem 9: 3-Digit Subtraction (764 − 241 = 523)
7
6
4
−
2
4
1
5
2
3
3
Problem 10: 3-Digit Subtraction (589 − 357 = 232)
5
8
9
−
3
5
7
2
3
2
2
Problem 11: 4-Digit Subtraction (8576 − 3243 = 5333)
8
5
7
6
−
3
2
4
3
5
3
3
3
3
Problem 12: 4-Digit Subtraction (9684 − 4152 = 5532)
9
6
8
4
−
4
1
5
2
5
5
3
3
2
Math Mastery Review • ANSWER KEY Page 2 of 6
TEACHER ANSWER KEY Student: CLASS ANSWER KEY
Part 3: Subtraction with Regrouping (Answers) Step-by-step borrowing marks are shown in the carry row.
Problem 13: 2-Digit Subtraction (73 − 45 = 28)
6
13
7
3
−
4
5
2
8
Problem 14: 2-Digit Subtraction (62 − 38 = 24)
5
12
6
2
−
3
8
2
4
Problem 15: 3-Digit Subtraction (524 − 186 = 338)
4
11
14
5
2
4
−
1
8
6
3
3
8
8
Problem 16: 3-Digit Subtraction (813 − 457 = 356)
7
10
13
8
1
3
−
4
5
7
3
5
6
6
Problem 17: 4-Digit Subtraction (6235 − 2848 = 3387)
5
11
12
15
6
2
3
5
−
2
8
4
8
3
3
8
7
7
Problem 18: 4-Digit Subtraction (7142 − 3569 = 3573)
6
10
13
12
7
1
4
2
−
3
5
6
9
3
5
7
3
3
Math Mastery Review • ANSWER KEY Page 3 of 6
TEACHER ANSWER KEY Student: CLASS ANSWER KEY
Part 4: Rounding (Answers) Correct rounding dots and rounded values are pre-filled in red.
Problem 19: Round to Nearest 10
Round 74 to the nearest ten:
70 75 80
Answer: 70
Problem 20: Round to Nearest 10
Round 187 to the nearest ten:
180 185 190
Answer: 190
Problem 21: Round to Nearest 100
Round 348 to the nearest hundred:
300 350 400
Answer: 300
Problem 22: Round to Nearest 100
Round 2,653 to the nearest hundred:
2,600 2,650 2,700
Answer: 2,700
Problem 23: Round to Nearest 1000
Round 4,189 to the nearest thousand:
4,000 4,500 5,000
Answer: 4,000
Problem 24: Round to Nearest 1000
Round 8,752 to the nearest thousand:
8,000 8,500 9,000
Answer: 9,000
Math Mastery Review • ANSWER KEY Page 4 of 6
TEACHER ANSWER KEY Student: CLASS ANSWER KEY
Part 5: Telling Time (Answers) Analog times mapped to red digital digits inside the answer squares.
Problem 25: To the Hour (4:00)
12 1 2 3 4 5 6 7 8 9 10 11
4
:
00
Problem 26: To the Half Hour (7:30)
12 1 2 3 4 5 6 7 8 9 10 11
7
:
30
Problem 27: To 5 Minutes (10:15)
12 1 2 3 4 5 6 7 8 9 10 11
10
:
15
Problem 28: To 5 Minutes (2:40)
12 1 2 3 4 5 6 7 8 9 10 11
2
:
40
Problem 29: To the Exact Minute (8:12)
12 1 2 3 4 5 6 7 8 9 10 11
8
:
12
Problem 30: To the Exact Minute (11:37)
12 1 2 3 4 5 6 7 8 9 10 11
11
:
37
Math Mastery Review • ANSWER KEY Page 5 of 6
TEACHER ANSWER KEY Student: CLASS ANSWER KEY
Part 6: Counting Change (Answers) Step-by-step additions and total dollar amounts are pre-filled in red.
Problem 31: Count Coins up to $1.00 (Answer: $0.78)
Count the total amount of money shown below:
Quarter 25¢
Quarter 25¢
Dime 10¢
Dime 10¢
Nickel 5¢
Penny 1¢
Penny 1¢
Penny 1¢
Scratchpad / Show Your Work (Pre-filled):
• Group Quarters: 25¢ + 25¢ = 50¢
• Group Dimes & Nickels: 10¢ + 10¢ + 5¢ = 25¢
• Group Pennies: 1¢ + 1¢ + 1¢ = 3¢
• Total Addition: 50¢ + 25¢ + 3¢ = 78¢ (or $0.78)
Total Value: $ 0.78
Problem 32: Count Coins up to $1.00 (Answer: $0.99)
Count the total amount of money shown below:
Quarter 25¢
Quarter 25¢
Quarter 25¢
Dime 10¢
Nickel 5¢
Nickel 5¢
Penny 1¢
Penny 1¢
Penny 1¢
Penny 1¢
Scratchpad / Show Your Work (Pre-filled):
• Group Quarters: 25¢ + 25¢ + 25¢ = 75¢
• Group Dimes & Nickels: 10¢ + 5¢ + 5¢ = 20¢
• Group Pennies: 1¢ + 1¢ + 1¢ + 1¢ = 4¢
• Total Addition: 75¢ + 20¢ + 4¢ = 99¢ (or $0.99)
Total Value: $ 0.99
Math Mastery Review • ANSWER KEY Page 6 of 6
