THE MAGIC OF

SUBTRACTION

2009 Quinín Freire

1

LEARNING

Solvethe

equations

1Click on the right

answer

2413-

11 12 21

correct !

Try

again

2Click on the right

answer

5331-

22 12 21

very good!

Tryagain

3Click on the right

answer

2720-

17 47 7

good job!

Try

again

4Click on the right

answer

5632-

84 24 14

well done!

Tryagain

5Click on the right

answer

2611-

37 15 25

right !

Try

again

6Click on the right

answer

4937-

13 22 12

great !

Tryagain

7Click on the right

answer

3522-

57 23 13

fantastic !

Try

again

8Click on the right

answer

7715-

62 72 52

terrific !

Try

again

9Click on the right

answer

6824-

14 44 34

way to go !

Tryagain

10

Click on the right answer

7914-

65 55 75

super !

Try

again

11

Click on the right answer

3423-

12 21 11

correct !

Tryagain

12

Click on the right answer

6320-

53 83 43

very good !

Try

again

13

Click on the right answer

5521-

24 34 44

good job!

Tryagain

14

Click on the right answer

7611-

85 65 75

well done !

Tryagain

15

Click on the right answer

4744-

91 13 3

right !

Tryagain

16

Click on the right answer

5721-

36 26 78

great !

Try

again

17

Click on the right answer

5433-

21 87 11

fantastic !

Try

again

18

Click on the right answer

5551-

106 4 14

terrific !

Try

again

19

Click on the right answer

5830-

18 82 28

way to go !

Try

again

20

Click on the right answer

4826-

12 22 32

you´re done!

Try

again

The end2009 Quinín

Freire