1
Multiple Choice
Hard
1 Mark
What is the difference between (50 + 10) and (28 + 10)?
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Correct Answer:
22
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (50 + 10) - (28 + 10) = 50 - 28 = 22.
2
Multiple Choice
Hard
1 Mark
A secret number plus 22 equals 50. If you double the secret number, what is the result?
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Correct Answer:
56
Step-by-Step Explanation:
The secret number is 28. Doubling it gives 28 × 2 = 56.
3
Multiple Choice
Hard
1 Mark
If 28 + 22 = 50, what is 22 + 28?
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▼
Correct Answer:
50
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
4
Multiple Choice
Hard
1 Mark
Why is 50 greater than 28?
A
Because {v1} is an even number
B
Numbers ending in 0 are always smaller
C
Because {tot} has a bigger first digit
D
Because 50 includes 28 plus an additional 22 items
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▼
Correct Answer:
Because 50 includes 28 plus an additional 22 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
5
Multiple Choice
Medium
1 Mark
Sam evaluated 50 - 22 and wrote 72. What was Sam's mistake?
A
He divided the numbers
B
He added instead of subtracting
C
He forgot the units place
D
He multiplied by 2
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
6
Multiple Choice
Medium
1 Mark
A student claimed that 28 + 22 = 60 because 'we must add 10 to every answer'. Why is this student wrong?
A
The student subtracted instead
B
Addition is only for 1-digit numbers
C
Addition means combining only the given numbers without adding extra amounts
D
The answer is 0
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▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
28 + 22 equals exactly 50.
7
Multiple Choice
Medium
1 Mark
Complete the pattern: 28, 33, 38, [ ? ].
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▼
Correct Answer:
43
Step-by-Step Explanation:
The pattern increases by 5. 38 + 5 = 43.
8
Multiple Choice
Medium
1 Mark
Find the missing number: 28 + [ ? ] = 50.
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▼
Correct Answer:
22
Step-by-Step Explanation:
Missing value is 22 because 28 + 22 = 50.
9
Multiple Choice
Medium
1 Mark
In a school garden, there are 28 yellow marigolds and 22 purple petunias. How many flowers are blooming in total?
A
28 flowers
B
55 flowers
C
22 flowers
D
50 flowers
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▼
Correct Answer:
50 flowers
Step-by-Step Explanation:
28 + 22 = 50 flowers.
10
Multiple Choice
Medium
1 Mark
A school library received 50 new graphic novels. Students checked out 22 novels on Monday. How many new novels are still on the shelf?
A
29 novels
B
22 novels
C
50 novels
D
28 novels
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▼
Correct Answer:
28 novels
Step-by-Step Explanation:
50 - 22 = 28 novels remaining.
11
Multiple Choice
Medium
1 Mark
A baker packed 28 apple pies in the morning and 22 cherry pies in the afternoon. How many pies did the baker pack in all?
A
48 pies
B
28 pies
C
50 pies
D
52 pies
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▼
Correct Answer:
50 pies
Step-by-Step Explanation:
28 + 22 = 50 pies in total.
12
Multiple Choice
Easy
1 Mark
What number is 10 more than 28?
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▼
Correct Answer:
38
Step-by-Step Explanation:
28 + 10 = 38.
13
Multiple Choice
Easy
1 Mark
Which comparison is correct: 50 [ ? ] 45?
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▼
Correct Answer:
>
Step-by-Step Explanation:
50 is greater than 45.
14
Multiple Choice
Easy
1 Mark
Calculate: 50 - 22 = ?
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▼
Correct Answer:
28
Step-by-Step Explanation:
50 - 22 = 28.
15
Multiple Choice
Easy
1 Mark
In Chapter 'Time and Calendar', calculate: 28 + 22 = ?
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▼
Correct Answer:
50
Step-by-Step Explanation:
28 + 22 = 50.
16
Multiple Choice
Hard
1 Mark
What is the difference between (40 + 10) and (21 + 10)?
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▼
Correct Answer:
19
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (40 + 10) - (21 + 10) = 40 - 21 = 19.
17
Multiple Choice
Hard
1 Mark
A secret number plus 19 equals 40. If you double the secret number, what is the result?
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Correct Answer:
42
Step-by-Step Explanation:
The secret number is 21. Doubling it gives 21 × 2 = 42.
18
Multiple Choice
Hard
1 Mark
If 21 + 19 = 40, what is 19 + 21?
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▼
Correct Answer:
40
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
19
Multiple Choice
Hard
1 Mark
Why is 40 greater than 21?
A
Because {tot} has a bigger first digit
B
Because {v1} is an even number
C
Because 40 includes 21 plus an additional 19 items
D
Numbers ending in 0 are always smaller
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
Because 40 includes 21 plus an additional 19 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
20
Multiple Choice
Medium
1 Mark
Sam evaluated 40 - 19 and wrote 59. What was Sam's mistake?
A
He forgot the units place
B
He added instead of subtracting
C
He divided the numbers
D
He multiplied by 2
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
21
Multiple Choice
Medium
1 Mark
A student claimed that 21 + 19 = 50 because 'we must add 10 to every answer'. Why is this student wrong?
A
Addition is only for 1-digit numbers
B
The student subtracted instead
C
Addition means combining only the given numbers without adding extra amounts
D
The answer is 0
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
21 + 19 equals exactly 40.
22
Multiple Choice
Medium
1 Mark
Complete the pattern: 21, 26, 31, [ ? ].
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▼
Correct Answer:
36
Step-by-Step Explanation:
The pattern increases by 5. 31 + 5 = 36.
23
Multiple Choice
Medium
1 Mark
Find the missing number: 21 + [ ? ] = 40.
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▼
Correct Answer:
19
Step-by-Step Explanation:
Missing value is 19 because 21 + 19 = 40.
24
Multiple Choice
Medium
1 Mark
In a school garden, there are 21 yellow marigolds and 19 purple petunias. How many flowers are blooming in total?
A
19 flowers
B
21 flowers
C
40 flowers
D
45 flowers
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
40 flowers
Step-by-Step Explanation:
21 + 19 = 40 flowers.
25
Multiple Choice
Medium
1 Mark
A school library received 40 new graphic novels. Students checked out 19 novels on Monday. How many new novels are still on the shelf?
A
21 novels
B
19 novels
C
40 novels
D
22 novels
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
21 novels
Step-by-Step Explanation:
40 - 19 = 21 novels remaining.
26
Multiple Choice
Medium
1 Mark
A baker packed 21 apple pies in the morning and 19 cherry pies in the afternoon. How many pies did the baker pack in all?
A
38 pies
B
21 pies
C
40 pies
D
42 pies
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
40 pies
Step-by-Step Explanation:
21 + 19 = 40 pies in total.
27
Multiple Choice
Easy
1 Mark
What number is 10 more than 21?
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▼
Correct Answer:
31
Step-by-Step Explanation:
21 + 10 = 31.
28
Multiple Choice
Easy
1 Mark
Which comparison is correct: 40 [ ? ] 35?
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▼
Correct Answer:
>
Step-by-Step Explanation:
40 is greater than 35.
29
Multiple Choice
Easy
1 Mark
Calculate: 40 - 19 = ?
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▼
Correct Answer:
21
Step-by-Step Explanation:
40 - 19 = 21.
30
Multiple Choice
Easy
1 Mark
In Chapter 'Time and Calendar', calculate: 21 + 19 = ?
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▼
Correct Answer:
40
Step-by-Step Explanation:
21 + 19 = 40.
31
Multiple Choice
Hard
1 Mark
What is the difference between (65 + 10) and (49 + 10)?
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▼
Correct Answer:
16
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (65 + 10) - (49 + 10) = 65 - 49 = 16.
32
Multiple Choice
Hard
1 Mark
A secret number plus 16 equals 65. If you double the secret number, what is the result?
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▼
Correct Answer:
98
Step-by-Step Explanation:
The secret number is 49. Doubling it gives 49 × 2 = 98.
33
Multiple Choice
Hard
1 Mark
If 49 + 16 = 65, what is 16 + 49?
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▼
Correct Answer:
65
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
34
Multiple Choice
Hard
1 Mark
Why is 65 greater than 49?
A
Because {tot} has a bigger first digit
B
Because {v1} is an even number
C
Numbers ending in 0 are always smaller
D
Because 65 includes 49 plus an additional 16 items
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
Because 65 includes 49 plus an additional 16 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
35
Multiple Choice
Medium
1 Mark
Sam evaluated 65 - 16 and wrote 81. What was Sam's mistake?
A
He forgot the units place
B
He added instead of subtracting
C
He multiplied by 2
D
He divided the numbers
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.
36
Multiple Choice
Medium
1 Mark
A student claimed that 49 + 16 = 75 because 'we must add 10 to every answer'. Why is this student wrong?
A
The answer is 0
B
The student subtracted instead
C
Addition means combining only the given numbers without adding extra amounts
D
Addition is only for 1-digit numbers
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
Addition means combining only the given numbers without adding extra amounts
Step-by-Step Explanation:
49 + 16 equals exactly 65.
37
Multiple Choice
Medium
1 Mark
Complete the pattern: 49, 54, 59, [ ? ].
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▼
Correct Answer:
64
Step-by-Step Explanation:
The pattern increases by 5. 59 + 5 = 64.
38
Multiple Choice
Medium
1 Mark
Find the missing number: 49 + [ ? ] = 65.
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▼
Correct Answer:
16
Step-by-Step Explanation:
Missing value is 16 because 49 + 16 = 65.
39
Multiple Choice
Medium
1 Mark
In a school garden, there are 49 yellow marigolds and 16 purple petunias. How many flowers are blooming in total?
A
16 flowers
B
49 flowers
C
70 flowers
D
65 flowers
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
65 flowers
Step-by-Step Explanation:
49 + 16 = 65 flowers.
40
Multiple Choice
Medium
1 Mark
A school library received 65 new graphic novels. Students checked out 16 novels on Monday. How many new novels are still on the shelf?
A
16 novels
B
49 novels
C
50 novels
D
65 novels
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
49 novels
Step-by-Step Explanation:
65 - 16 = 49 novels remaining.
41
Multiple Choice
Medium
1 Mark
A baker packed 49 apple pies in the morning and 16 cherry pies in the afternoon. How many pies did the baker pack in all?
A
67 pies
B
65 pies
C
49 pies
D
63 pies
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
65 pies
Step-by-Step Explanation:
49 + 16 = 65 pies in total.
42
Multiple Choice
Easy
1 Mark
What number is 10 more than 49?
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▼
Correct Answer:
59
Step-by-Step Explanation:
49 + 10 = 59.
43
Multiple Choice
Easy
1 Mark
Which comparison is correct: 65 [ ? ] 60?
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▼
Correct Answer:
>
Step-by-Step Explanation:
65 is greater than 60.
44
Multiple Choice
Easy
1 Mark
Calculate: 65 - 16 = ?
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▼
Correct Answer:
49
Step-by-Step Explanation:
65 - 16 = 49.
45
Multiple Choice
Easy
1 Mark
In Chapter 'Time and Calendar', calculate: 49 + 16 = ?
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▼
Correct Answer:
65
Step-by-Step Explanation:
49 + 16 = 65.
46
Multiple Choice
Hard
1 Mark
What is the difference between (55 + 10) and (42 + 10)?
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▼
Correct Answer:
13
Step-by-Step Explanation:
Adding 10 to both numbers does not change their difference: (55 + 10) - (42 + 10) = 55 - 42 = 13.
47
Multiple Choice
Hard
1 Mark
A secret number plus 13 equals 55. If you double the secret number, what is the result?
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▼
Correct Answer:
84
Step-by-Step Explanation:
The secret number is 42. Doubling it gives 42 × 2 = 84.
48
Multiple Choice
Hard
1 Mark
If 42 + 13 = 55, what is 13 + 42?
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▼
Correct Answer:
55
Step-by-Step Explanation:
The order of addends does not affect the sum (commutative property).
49
Multiple Choice
Hard
1 Mark
Why is 55 greater than 42?
A
Numbers ending in 0 are always smaller
B
Because 55 includes 42 plus an additional 13 items
C
Because {tot} has a bigger first digit
D
Because {v1} is an even number
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
Because 55 includes 42 plus an additional 13 items
Step-by-Step Explanation:
Adding a positive quantity always increases the total.
50
Multiple Choice
Medium
1 Mark
Sam evaluated 55 - 13 and wrote 68. What was Sam's mistake?
A
He added instead of subtracting
B
He divided the numbers
C
He forgot the units place
D
He multiplied by 2
💡 Click to View Correct Answer & Explanation
▼
Correct Answer:
He added instead of subtracting
Step-by-Step Explanation:
The minus sign means subtraction (taking away), but Sam performed addition.