Title: Properties of Numbers
Course: quiz duplicate error

Q: Write an equivalent expression. Use a commutative law.

9 + xy
- 9 + x + y (incorrect)
- xy + 9, or 9 + yx (correct)
- 9(1 + xy) (incorrect)
- 9xy, or 9yx (incorrect)
A: xy + 9, or 9 + yx

Q: Write an equivalent expression. Use an associative law.

(x + 4) + y
- x(4 + y) (incorrect)
- x + (4 + y) (correct)
- (4 + x) + y (incorrect)
- y + (x + 4) (incorrect)
A: x + (4 + y)

Q: Multiply.

9(x + 7)
- 9x + 9 (incorrect)
- 63x (incorrect)
- 9x + 7 (incorrect)
- 9x + 63 (correct)
A: 9x + 63

Q: Write an equivalent expression. Use a commutative law.

y + 13
- 13 + y (correct)
- 13(y + 1) (incorrect)
- y13 (incorrect)
- 13y (incorrect)
A: 13 + y

Q: Write an equivalent expression. Use an associative law.

8 + (s + t)
- (s + t) + 8 (incorrect)
- 8(s + t) (incorrect)
- (8 + s) + t (correct)
- 8 + (t + s) (incorrect)
A: (8 + s) + t

Q: Write an equivalent expression. Use an associative law.

a + (b + 7)
- (b + 7) + a (incorrect)
- a + (7 + b) (incorrect)
- a(b + 7) (incorrect)
- (a + b) + 7 (correct)
A: (a + b) + 7

Q: Write an equivalent expression. Use a commutative law.

pq + z
- pq - z (incorrect)
- pqz, or p + q + z (incorrect)
- z - pq (incorrect)
- qp + z, or z + pq (correct)
A: qp + z, or z + pq

Q: Write an equivalent expression. Use an associative law.

8(np)
- 8(n + p) (incorrect)
- 8(pn) (incorrect)
- 8n + 8p (incorrect)
- (8n)p (correct)
A: (8n)p

Q: Multiply.

4(5 + m)
- 20 + 4m (correct)
- 20 + 5m (incorrect)
- 20 + m (incorrect)
- 20m (incorrect)
A: 20 + 4m

Q: Multiply.

7(6 + 2s)
- 42 + 84s (incorrect)
- 42 + 14s (correct)
- 42 + 2s (incorrect)
- 6 + 14s (incorrect)
A: 42 + 14s

Q: Write an equivalent expression. Use an associative law.

(8s)t
- (s8)t (incorrect)
- 8s + 8t (incorrect)
- 8(st) (correct)
- t(8s) (incorrect)
A: 8(st)

Q: Write an equivalent expression. Use an associative law.

(4 + u) + v
- (4 + v) + u (incorrect)
- 4 + (u + v) (correct)
- (u + 4) + v (incorrect)
- v + (4 + u) (incorrect)
A: 4 + (u + v)

Q: Write an equivalent expression. Use a commutative law.

3 + b
- b + 3 (correct)
- 3b (incorrect)
- b3 (incorrect)
- 3(1 + b) (incorrect)
A: b + 3

Q: Write an equivalent expression. Use a commutative law.

wx
- w ÷ x (incorrect)
- xw (correct)
- [Image] (incorrect)
- w + x (incorrect)
A: xw

Q: Write an equivalent expression. Use an associative law.

(4x)y
- (x4)y (incorrect)
- 4x + 4y (incorrect)
- 4(xy) (correct)
- (4y)x (incorrect)
A: 4(xy)

Q: Write an equivalent expression. Use an associative law.

r + (5 + s)
- (5 + s) + r (incorrect)
- (r + 5) + s (correct)
- r(5 + s) (incorrect)
- r + (s + 5) (incorrect)
A: (r + 5) + s

Q: Multiply.

8(a + b)
- 8ab (incorrect)
- 8a + b (incorrect)
- 8a + 8b (correct)
- 16ab (incorrect)
A: 8a + 8b

Q: Multiply.

2(6x + 9y + 5)
- 12x + 18y + 5 (incorrect)
- 12x + 9y + 10 (incorrect)
- 12x + 18y + 10 (correct)
- 12x + 9y + 5 (incorrect)
A: 12x + 18y + 10

Q: Multiply.

3(5x + 3)
- 5x + 9 (incorrect)
- 15x + 9 (correct)
- 15x + 3 (incorrect)
- 45x (incorrect)
A: 15x + 9

Q: Write an equivalent expression. Use an associative law.

6(ab)
- 6a + 6b (incorrect)
- (6a)b (correct)
- 6(ba) (incorrect)
- a(6b) (incorrect)
A: (6a)b

Q: True or False: There is a commutative property for subtraction. Example: 7 - 3 = 3 - 7
- True
- False
A: False