Addition/Subtraction
345 + 278 = ?
What is 623?
What are the prime factors of 12?
2 × 2 × 3
GCF of 12 and 18
6
25 × 4 = ?
100
A bag has 24 candies. You eat 6. How many left?
18 candies
1,204 – 879 = ?
325
Prime factors of 30.
2 × 3 × 5
LCM of 3 and 5
15
84 ÷ 7 = ?
12
A pencil costs $2.50. How much for 4 pencils?
$10
Add: 3,476 + 5,982 + 2,304
What is 762?
Write 72 as a product of primes.
2 × 2 × 2 × 3 × 3
GCF of 24 and 36
12
36 × 25 = ?
900
Sara had $50. She spent $18 on lunch and $12 on a book. How much left?
$20
Subtract: 10,000 – 6,587
413
Prime factorization of 98.
2 × 7 × 7
LCM of 8 and 12
2,448 ÷ 12 = ?
204
A class of 28 students is divided into groups of 4. How many groups?
7 groups
The sum of two numbers is 8,500. One number is 4,375. What is the other number?
What is 4,125?
Find the prime factorization of 180
2 × 2 × 3 × 3 × 5
Find the GCF and LCM of 15 and 20.
GCF = 5, LCM = 60
A factory produces 4,725 pencils in 9 days. How many per day?
525 pencils
A farmer has 135 apples. He puts them into baskets of 9 apples each. He sells 8 baskets. How many apples are left?
135 ÷ 9 = 15 baskets → 15 - 8 = 7 baskets → 7 × 9 = 63 apples left