Show:
addition 1
subtraction 1
addition 2
Subtraction 2
Mystery
100
What equation can be added to make 7?

2+5

7+0

1+6

3+4

100

Equation that makes 8?

8-0

9-1

100

22+32

54

100

72-11

61

100

15-5

10

200

What equation makes 9?

7+2

5+4

1+8

9+0

200

Equation that makes 5?

6-1

9-4

8-3

7-2

200

62+18

80

200

83-31

52

200

85+23

108

300

What equation equals 10?

10+0

9+1

8+2

7+3

6+4

5+5

300

Equation that makes 2?

10-8

9-7

6-4

8-6

3-1

300

23+42

65

300

28-13

15

300

25+8

32

400

What equation equals 4?

4+0

2+2

3+1

400

Equation that makes 6?

9-3

7-1

8-2

400

82+31

113

400

72-61

11

400

56-15

41

500

What two equation can add  up to 2?

1+1

2+0

500
What two equation can make 4?

9-5

8-4

7-3

4-0

500

25+4

35+10

29

45

500

82-31

59-34

51

25

500

25+5+8

38