Write an Expression
Find 3 times the difference between 8 and 21.
3 x (8 - 21)
(8 + 5 x 9) - 2
51
3 x 3 = 9
2 + 5 x 3 = 21
Correct answer is 17. They did addition before multiplication, which does not follow PEMDAS.
Answer to an addition problem.
Sum
(5 x 4) + (9 + 30)
20 + (9 x 7) - 17
66
Solve 24
2 x 2 x 2 x 2 = 16
52 + 1 = 11
They did not solve the exponent correctly. They did 5 x 2 instead of 5 x 5 when solving the exponent.
Answer to a multiplication problem.
Product
Subtract 162,47, and 3. Then multiply by 2.
(162 - 47 - 3) x 2 or [(162 - 47) - 3] x 2
(4 x 8) - (3 x 6)
14
Solve 53
5 x 5 x 5 = 125
3 + 7 + 2 - 4 x 3 = 24
The correct answer is 0. They did addition before multiplication.
Answer to a subtraction problem.
Difference
Add 2 to the quotient of 9 and 3.
2 + (9 divided by 3)
[(72 + 5) x 2] - 50
104
Solve 43
4 x 4 x 4 = 64
80 - 8 x 2 - 3 + 10 = 151
The correct answer is 71. They did subtraction before multiplication.
Answer to a division problem.
Quotient
Find the difference of 31 and 17 divided by the product of 10 and 4.
(31 - 17) divided by (10 × 4)
3 x [(12 x 8) + 379] - 4
1,421
Solve 106
10 x 10 x 10 x 10 x 10 x 10 = 1,000,000
3 x 52 = 225
The correct answer is 75. They did multiplication before solving the exponent.
What is Ms. Cool's favorite color?
Green :)