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Multiply
Mystery???
Signs
100

1 + 0 = ?

1

100

7 - 3 = ?

4

100

1 x 3 = ?

3

100

21 + 41 = ?

62

100

What does this sign mean in math?

(+)

add

200

9 + 2 = ?

11

200

1 -1 = ?

0

200

2 x 2 = ?

4

200

88 - 70 = ?

18

200

What does this sign mean in math?

(-)

subtract

300

5 + 3 = ?

8

300

12 - 6 = ?

6

300

5 x 4 = ?

20

300

12 x 10 = ?

120

300

What does this sign mean in math?

(x)

multiply

400

8 + 8 = ?

16

400

18 - 9 = ?

9

400

7 x 8 = ?

56

400

49 + 82 = ?

131

400

What does this sign mean in math?

(⋅)

multiply

500

10 + 7 = ?

17

500

19 - 10 = ?

9

500

9 x 9 = ?

81

500

63 - 39 = ?

24

500

What are we doing with these numbers? (9)(7)

1) Adding

2) Subtracting

3) Multiplying

3) Multiplying