Word Stuff
What number does the word cubed represent in exponents?
The number 3.
Identify the error and correctly solve
9 - 3 x 2
Answer: 12
Correct answer is 3 because we have to multiply before we subtract.
7 x 8 - 42
40
What is 3,400,000,000 in scientific notation?
3.4 x 109
What is 17.5 x 6?
105
A combination of numbers and a least one operation.
What is a numerical expression?
Find the error in solving 52 + 1
Answer: 11
5 2 = 25, not 10. Correct Answer is 26.
5 + 14 ÷ 2 × 9
68
What is 6.872 x 1011
687,200,000,000
What is (4.7)2
22.09
Exponents are a quicker way to write what?
Repeated multiplication
Find the error in solving 4 + 5 + 7 - 3 x 2
Answer: 26
You need to do multiplication first. The correct answer is 10.
Write 479 in scientific notation
4.79 x 102
What is 300 - 24.3
275.7
What operation must you complete first in
43 x (16 -2 + 8)
Subtraction
Correct the error in solving
5 + 2( 6 + 3 ÷ 3 )
Answer: 11
They added 6 + 3 inside the parentheses. The correct step is to do 3 ÷ 3 first.
The correct answer is: 19
12 + 22 x 32 - 42
21
Write this number in scientific notation.
5,063,240,000,000
5.06324 x 1012
29.04 + 9.35 ÷ 5
30.91
Why is it important for us to use Order of Operations when solving numerical expressions?
To make sure that everyone gets the same answer. Different people would solve the same problem different ways.
Correct the error
8 ÷ 23 + 16 ÷ 2
Answer 72
first.
The answer should be 9
6 (7 ÷ 1/3) - 52
101
What error did the student make when writing this number in scientific notation?
62.3 x 105
The decimal number is too high. It has to be somewhere between 1 and 10.
38.4 - 3.63 x 2
31.14