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Pre-AlgebraUnit 1 Review
Unit 1 Review
1) Name the property demonstrated.
a) a + b = b + a
b) a(b + c) = ab + ac
Unit 1 Review
1) Name the property demonstrated.
a) a + b = b + a
Commutative property of addition
b) a(b + c) = ab + ac
distributive property
Answer
Unit 1 Review
2) Name the property demonstrated.
a) ab = ba
b) a + (b + c) = (a + b) + c
Unit 1 Review
2) Name the property demonstrated.
a) ab = ba
commutative property of multiplication
b) a + (b + c) = (a + b) + c
associative property of addition
Answer
Unit 1 Review
3) Simplify.
a) 5x + 3y + 3x + 2y
Unit 1 Review
3) Simplify.
a) 5x + 3y + 3x + 2y = 8x + 5y
Answer
Unit 1 Review
4) Simplify.
a) 4 + 6(a + 2) + 3a
Unit 1 Review
4) Simplify.
a) 4 + 6(a + 2) + 3a = 9a + 16
Answer
Unit 1 Review
5) Solve for x.
a) x + 19 = 30
b) 38 + x -18 = 500
Unit 1 Review
5) Solve for x.
a) x + 19 = 30
x = 11
b) 38 + x -18 = 500
x = 480
Answer
Unit 1 Review
6) Solve for y.
a) 8y = 96
b) y / 12 = -24
Unit 1 Review
6) Solve for y.
a) 8y = 96
y = 12
b) y / 12 = -24
y = -288
Answer
Unit 1 Review
7) Write an equation for the problem and solve.
a) Twice a number increased by 28 is 54.
Unit 1 Review
7) Write an equation for the problem and solve.
a) Twice a number increased by 28 is 54.
2n + 28 = 54
n = 13
Answer
Unit 1 Review
8) Write an equation for the problem and solve.
a) Terry’s age is half Bobby’s age. The sum of their ages is 36. How old are they?
Unit 1 Review
8) Write an equation for the problem and solve.
a) Terry’s age is half Bobby’s age. The sum of their ages is 36. How old are they?
Terry’s age is a.
Bobby’s age is 2a
a + 2a = 36
a = 12
So, Terry is 12 and Bobby is 24.
Answer
Unit 1 Review
9) Solve for n.
2│n│ = 10
Unit 1 Review
9) Solve for n.
2│n│ = 10
n = ±5
Answer
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