Sum-difference-product Flashcards by Olivia Louko

Q

2+4

A

6

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Q

2+5

A

7

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Q

2+6

A

8

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Q

2+7

A

9

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Q

2+3

A

5

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Q

2+8

A

10

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Q

2+9

A

11

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Q

3+3

A

6

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Q

3+4

A

7

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Q

3+5

A

8

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Q

3+6

A

9

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Q

3+7

A

10

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Q

3+8

A

11

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Q

3+9

A

12

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Q

4+4

A

8

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Q

4+5

A

9

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Q

4+6

A

10

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Q

2+2

A

4

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Q

4+7

A

11

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Q

4+8

A

12

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Q

4+9

A

13

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Q

5+5

A

10

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Q

5+6

A

11

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Q

5+7

A

12

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Q

5+8

A

13

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Q

5+9

A

14

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Q

6+6

A

12

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Q

6+7

A

13

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Q

6+8

A

14

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Q

6+9

A

15

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Q

7+7

A

14

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Q

7+8

A

15

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Q

7+9

A

16

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Q

8+8

A

16

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Q

8+9

A

17

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Q

9+9

A

18

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Q

2x2

A

4

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Q

2x3

A

6

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Q

2x4

A

8

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Q

2x5

A

10

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Q

2x6

A

12

Q

2x7

A

14

Q

2x8

A

16

Q

2x9

A

18

Q

3x3

A

9

Q

3x4

A

12

Q

3x5

A

15

Q

3x6

A

18

Q

3x7

A

21

Q

3x8

A

24

Q

3x9

A

27

Q

4x4

A

16

Q

4x5

A

20

Q

4x6

A

24

Q

4x7

A

28

Q

4x8

A

32

Q

4x9

A

36

Q

5x5

A

25

Q

5x6

A

30

Q

5x7

A

35

Q

5x8

A

40

Q

5x9

A

45

Q

6x6

A

36

Q

6x7

A

42

Q

6x8

A

48

Q

6x9

A

54

Q

7x7

A

49

Q

7x8

A

56

Q

7x9

A

63

Q

8x8

A

64

Q

8x9

A

72

Q

9x9

A

81

Q

GCF/LCM Formula

A

LCM=PxQ/GCF

Q

Prime numbers 0-10

A

2-3-5-7

Q

Prime numbers 11-20

A

11-13-17-19

Q

Prime numbers 20-40

A

23-29-31-37

Q

2²

A

4

Q

3²

A

9

Q

4²

A

16

Q

5²

A

25

Q

6²

A

36

Q

7²

A

49

Q

8²

A

64

Q

9²

A

81

Q

11²

A

121

Q

12²

A

144

Q

13²

A

169

Q

2³

A

8

Q

3³

A

27

Q

4³

A

64

Q

5³

A

125

Q

6³

A

216

Q

7³

A

343

Q

8³

A

512

Q

9³

A

729

Q

Divisible by 4

A

If last two digits are divisible by 4

Q

Divisible by 3 or 9

A

If the sum of the digits is divisible by 3 or 9

Q

Divisible by 6

A

If divisible by both 2 and 3

Q

Prime numbers 40-60

A

41-43-47-53-59

Q

GCF

A

Take lower factors and multiply. Only if they are in both.
2³x3³x5
2^5x5³
=2³x5

Q

LCM

A

12=3 x 2²
75=3 x 5²
LCM=3 x 2² x 5²