Unit 3 Misconceptions

Subtract a number from 10

• 10 - n

• n - 10

• 10n

• 10/n

a number decreased by 12

• k - 12

• 12 - k

• 12k

• k/12

the quotient of a number doubled divided by 18

• 2m/18

• 18/2m

• 18m

• 2m -18

the sum of a number tripled plus 5 divided by 7

• 3b + 5 / 7

• 3b x 5/7

• 3b / 7

• 3b/5

Increased is another word for what operation?

• addition

• multiplication

• subtraction

• division

There are 20 rows of chairs with s chairs in each row. Write an expression that shows the number of chairs in total.

• 20s

• 20 - s

• 20 + s

• 20/s