Explain Your Thinking
Give the correct order of operations.
Brackets, Exponents, Multiplication OR Division, Addition OR Subtraction
9 - 3 x 2=12
Correct answer is 3. Do x then -, not - then x.
Identify all of the factors of 67.
Is it a prime or composite number?
1 and 67
Prime Number
True or false: When solving numeric expressions, you solve from right to left.
False: you solve from left to right.
5 2 + 1=11
5 2 = 25, not 10. Correct Answer is 26.
7 + 2 x 4 - 1
14
Is 1 a prime or composite number?
The number one is neither a prime or composite number.
London has 15 cookies and he eats 5. He shares what he has left with his best friend. How many cookies does each one get?
WRITE AND SOLVE THE NUMERICAL EXPRESSION.
15 - 5 /2 =5
32 - 6 = 0
3 2 = 9, not 6. Correct answer is 3
56 ÷ 8 + 9
16
Write 73 as a product of its prime factors.
73 = 1 x 73
Explain what 5 3 really means.
It means 5 x 5 x 5
4 + 5 + 7 - 3 x 2 = 26
Correct answer is 10.
20 – 5 + 3 x 2 + 4
25
Identify all the factors of 24.
1, 2, 3, 4, 6, 8, 12 and 24.
The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?
I went from left to right without using the correct order of operations.
10 3 = 30
10 3 = 10 x 10 x10, which is 1000, not 30.
5 x 4 – 6 ÷ 2 + 9
26
List all of the prime numbers from 1 to 100.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97