6th Math Chapter 1 Lesson 1

GCF

100

6 and 8

6: (1x6) (2x3)

8: (1x8) (2x9)

2

6: (1x6) (2x3)

8: (1x8) (2x9)

200

9 and 6

6: (1x6) (2x3)

9: (1x9) (3x3)

3

6: (1x6) (2x3)

9: (1x9) (3x3)

300

12 and 16

12: (1x12) (2x6) (3x4)

16: (1x16) (2x8) (4x4)

4

12: (1x12) (2x6) (3x4)

16: (1x16) (2x8) (4x4)

400

2 and 4

2

2: (1x2)

4: (1x4) (2x2)

500

3 and 8

1

3: (1x3)

8: (1x8) (2x4)

600

4 and 6

2

4: (1x4) (2x2)

6: (1x6) (2x3)

700

4 and 7

1

4: (1x4) (2x2)

7: (1x7)

800

4 and 8

4

4: (1x4) (2x2)

8: (1x8) (2x4)

900

9 and 12

3

9: (1x9) (3x3)

12: (1x12) (2x6) (3x4)

1000

15 and 21

3

15: (1x15) (3x5)

21: (1x21) (3x7)

LCM

100

3 and 12

3: 3, 6, 9, 12

12: 12, 24, 36, 48

12...

3: 3, 6, 9, 12

12: 12, 24, 36, 48

200

3 and 7

3: 3, 6, 9, 12, 15, 18, 21

21: 21, 42, 63

21

3: 3, 6, 9, 12, 15, 18, 21

21: 21, 42, 63

300

3 and 8

3: 3, 6, 9, 12, 15, 18, 21, 24

8: 8, 16, 24, 32

24

3: 3, 6, 9, 12, 15, 18, 21, 24

8: 8, 16, 24, 32

400

6 and 10

30

6: 6, 12, 18, 24, 30

10: 10, 20, 30

500

4 and 5

20

4: 4, 8, 12, 16, 20

5: 5, 10, 15, 20

600

2 and 8

8

2: 2, 4, 6, 8

8: 8, 16, 24 

700

2 and 9 

18

2: 2, 4, 6, 8, 10, 12, 14, 16, 18

9: 9, 18, 27

800

4 and 6

12

4: 4, 8, 12

12: 12, 24, 36

900

2 and 12

12

2: 2, 4, 6, 8, 10, 12

12: 12, 24, 36

1000

12 and 36

36

12: 12, 24, 36

36: 36, 72, 108

Random:

100

List the first 5 multiples of 5:

5, 10, 15, 20, 25

200

List the first 4 multiples of 6:

6, 12, 18, 24, 30

300

What are all the factor pairs of 20:

(1x20) (2x10) (4x5)

400

What is the GCF and the LCM of 3 and 7?

GCF: 1

3: (1x3)      7: (1x7)

LCM: 21

3: 3, 6, 9, 12, 15, 18, 21

7: 7, 14, 21

500

2 + 2

4

600

24 divide 3

8

700

37 - 16 

21

800

Which is the answer to an addition problem?

sum or difference

sum

900

____ x factor = product

factor

1000

4 x  _____ = 48

12