Math Expressions

the sum of fifty-two and a number

• n-52

• 52 + n

• 52/n

• 52n

Choose the phrase that matches the expression   21h

• 21 more friends than expected at the party

• 21 more horses in the pasture

• 21 dollars per hour

• 21 balloons were popped at the party

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10

• 12

• 15

• 36

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a

• 5

• 6

• 8

• 10

Simplify: 2xy +10x² - 9xy

• 10x² - 7

• 10x² + 11x²y²

• 10x² +11xy

• 10x² - 7xy

Which expression does not equal 21?

• 3x  when  x = 7

• 42/y when  y = 2

• 18 + e   when e = 4

• 30 - j   when j = 9

Are these two expressions equivalent?  Use substitution.  
4x + 3    and        9x - 20   if x= 4

• Yes, both equal

• No, not equal

Write the phrase as an algebraic expression:

the product of 2 and p

• 2 + p

• 2 - p

• 2p

Write the phrase as an algebraic expression:

3 more than y

• y + 3

• y - 3

• 3y

Evaluate the expression 6a + 9 + a, when a = 4.

• 35

• 37

• 77

• 23