What's my number
Tell me how to make
Trade and keep?
Basic addition/subtraction
More or less
100

1 rod and 3 cubes

13

100

18

1 rod and 8 cubes

100

You have 19 cubes

Trade for 1 rod and keep 9 cubes

100

8+3

11

100

What is 10 less than 43

33

200
3 rods and 6 cubes

36

200

34

3 rods and 4 cubes

200

You have 11 cubes and 12 rod

Trade for 1 rod, keep 13 rods and 1 cube

200

9-6

3
200

What is 10 more than 42

52

300

4 rods and 9 cubes

49

300

46

4 rods and 6 cubes

300

You have 2 cubes and 14 rods

Zero trades, keep 2 cubes and 14 rods

300

23+6

29

300

What is 30 more than 60

90

400

7 rods and 11 cubes

81

400

82

8 rods and 2 cubes

400

You have 14 cubes and 15 rods

Trade for 1 rod and keep 16 rod and 4 cubes

400

44-6

38

400

What is 40 less than 80

40

500

8 rods and 19 cubes

99

500

97

9 rods and 7 cubes

500

You have 27 cubes and 19 rods

You trade for 2 rods, keep 21 longs and 7 cubes

500

99+7

106

500

What is 6 less than 92

86

M
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