Order of Operations
(7 x 6) + (2 x 8) = ?
58
What is a prime number?
a number that can only be divided by itself and 1 without leaving a remainder (ex: 7, 13, 29, 31)
Mr. Patterson has 42 chairs. He wants to put them in rows with the same number of chairs in each row. How many rows could he make?
1, 2, 3, 6, 7, 14, 21, or 42
23 x 5 -15 = ?
100
Is 6,525 a prime number?
Hint: To figure out if a number is prime, add all the digits, and if the sum is divisible by 3, then it is NOT prime
No
4 x 9 + 3 x 7
57
Name a number that has 3, 5, and 7 as prime factors.
Numbers will vary. (3x5x7=105)
Cryptarithm
On slide
10 x 4 - 8 + 12 x 3
68
Name a 4 digit prime number.
Answers will vary. If the digits add up to a number divisible by 3, then it is NOT prime.
Cube Problem
On slides.
What whole number is equal to (8 x 5 + 6 x 5) x (9 x 2 – 4 x 2)?
700
Name a prime factor that 315, 427, and 364 all share.
7
Ms. ReaWilson has $50. She bought 50 Valentine's Day cards which came in packages of 10. She paid $6 for each package. How much money does Ms. ReaWilson have left?
$20