1i) b.

1g) Answers will vary. The group would have 25 x N, where N is the number of students in the group. With 5 more each, the group would have 30 x N altogether. This is 5 x N more than the original number.

2i)

1. a.
2. b.
3. b.

2g) b.

3i) c.

3g) a.

4i) c.

4g) b.

5i)

1. a.
2. b.
3. c.

5g)

6i) a.

6g) c.

7i)

1. c.
2. b.
3. a.

7g)

1. a.
2. b.
3. c.

8i)

1. b.
2. a.
3. c.

8g)

1. b.
2. b.
3. c.

9i)

1. b.
2. c.
3. a.

9g) b.

10i) a.

10g) b.

11i)

1. c.
2. b.
3. c.

11g)1. 52. 5

Both problems equal +5, which shows that adding a positive number is equivalent to subtracting a negative number.

12i)

1. a.
2. b.
3. c.

12g)

1. c.
2. b.
3. a.

13i) a.

13g) c.

14i)

1. b.
2. c.
3. a.

14g)

1. c.
2. b.
3. c.

16i) c.

16g) a.

15i)

1. b.
2. b.
3. a.

15g)

1. (2cm) x (2cm) is one possible answer.
2. (5x²z⁵) x (5x²z⁴) is one possible answer.
3. (10h²k) x (10h²) is one possible answer.

17i)

1. c.
2. a.
3. c.

17g)

1. a.
2. c.
3. c.

18i) b.

18g) a.

19i)

1. b.
2. c.
3. c.

19g) a.

20i)

1. c.
2. a.
3. b.

20g)

1. a.
2. b.
3. c.