Addition
Find the sum: 3,425 + 2,163
5,588
Find the difference: 7,856 − 2,413
5,443
List all the factors of 12.
1, 2, 3, 4, 6, 12
List the first 5 multiples of 4.
4, 8, 12, 16, 20
Is 7 prime or composite?
Prime
Find the sum: 24,638 + 13,257
37,895
Find the difference: 48,765 − 23,429
25,336
List all the factors of 18.
1, 2, 3, 6, 9, 18
List the first 6 multiples of 7.
7, 14, 21, 28, 35, 42
Is 21 prime or composite? Explain how you know.
Composite; factors include 1, 3, 7, 21
Find the sum: 146,728 + 235,694
382,422
Find the difference: 72,503 − 38,276
34,227
Which number has more factors: 16 or 17?
16
What are the first 3 common multiples of 3 and 4?
12, 24, 36
Which numbers are prime: 11, 15, 19, 27?
11 and 19
A school collected 128,475 cans in one month and 246,839 cans the next month. How many cans were collected altogether?
375,314 cans
A library had 300,000 books and gave away 127,648. How many books remain?
172,352 books
A number has the factor pairs 1 × 24, 2 × 12, 3 × 8, and 4 × 6. What is the number?
24
True or false: Every multiple of 6 is also a multiple of 3. Explain.
True; 6 is a multiple of 3, so multiples of 6 are also multiples of 3.
I am a number between 30 and 40. I am prime. My digits add to 10. What number am I?
37
Mia says 287,496 + 135,728 = 413,224. Is she correct? If not, find the correct sum.
No; 423,224
Find the missing number: 500,000 − ___ = 278,649
221,351
I am a number between 20 and 30. I have exactly 6 factors. I am even. What number am I?
28
What is the smallest common multiple of 6 and 8?
24
Which statement is always true?
A) All odd numbers are prime.
B) All even numbers are composite.
C) A prime number has exactly 2 factors.
D) A composite number has exactly 2 factors.
C — A prime number has exactly 2 factors.