Expressions Substitutions

Rewrite (9 + 6) + 5 using the associative property.

• 20
• (9 + 6) + 5 = (9 + 5) + 6
• (9 + 6) + 5  = 9 + (6+5)
• (9 + 6) + 5  = 5 + 9 + 5 + 6

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a² + c²   

• 22
• 34
• 68
• 43

Three times a number increased by nine

• 3h-9
• 3(h-9)
• 3(h+9)
• 3h+9

Solve the equation: 
x + 7 = 12

• x = 5
• x = 19
• x = -5
• x = 84

What property of addition takes a whole number and adds it with zero?

• Associative
• Commutative
• Identity

the sum of fifty-two and a number

• n-52
• 52 + n
• 52/n
• 52n

Six divided by the product of -7 and b.

• 6/b-7
• 6/-7b
• -7b/6
• b-7/6

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

Simplify the Expression: 10x - 3(2x + 8)

• 4x - 24
• -4x + 24
• 16x - 24
• 14x - 6

Simplify using the distributive property: 3(2c - 5)

• 6c - 15

• 6c + 15

• 6c + 15

• -6c - 15