2 + 4

 Tables of addition - - - - - - - - - - Tables of subtraction - - - - - - - - - -

 Simple operations Combined operations Problems Aritmetic tables

Instructions: Press one of the buttons on the right column The correct number is put in red .

In the combined operations, you must do the first operation with the first two numbers. Then, you must do the second operation with the result and the third number.

# Simple operations

 2 + 4 = 4 + 9 = 6 + 2 = 8 + 10 = 10 + 6 = 10 - 3 = 7 - 5 = 16 - 7 = 19 - 9 = 20 - 11 =

# Combined operations

 6 +  4 - 5 = 2 + 5 + 6 = 5 + 1 - 1 = 6 - 4 - 2 = 3 - 2 + 3 = 11 + 8 + 7 = 9 + 10 - 8 = 8 + 7 - 7 = 10 + 11 - 6 = 9 + 6 + 9 =

# Problems

1. Yesterday I walked 3 kilometers in the morning and 6 kilometers in the afternoon.

How many kilometers did I walk altogether?

a) 3 kilometers.

b) 8 kilometers.

c) 9 kilometers.

2. In a kiosk I bought a comic at 40 cents and a seed bag at 60 cents.

How much money did I pay?

a) 100 cents.

b) 20 cents.

c) 50 cents.

3. My grandmother gave me 9 postcards for my collection. If I already had 11 postcards,

How many postcards do I have now?

a) 2 postcards.

b) 12 postcards.

c) 20 postcards.

4. Manuel has 11 marbles and Juan José has 8 marbles more.

How many marbles does Juan José have?

a) 19 marbles.

b) 3 marbles.

c) 6 marbles.

5. When I went out to recess, I had 6 marbles. I won 2 marbles in the game and then I lost 4.

How many marbles do I have at the end of the recess?

a) 12 marbles.

b) 8 marbles.

c) 4 marbles.

6. In a movie theater, there are 6 people. 2 more people come in and then 2 people come out.

How many people are left in the movie theater?

a) 10 people.

b) 2 people.

c) 6 people.

7. In a movie theater, there are 4 children. 2 of them come out and then 5 children come in.

How many children are there at the end of the movie?

a) 11 children.

b) 7 children.

c) 10 children.

8. 10 people travel in a bus. If 7 of them get down and then 11 people get in.

How many people are there in the bus?

a) 17 people.

b) 12 people.

c) 14 people.

9. In a circus, there were 6 elephants, 9 tigers and 10 monkeys.

How many animals were there in the circus?

a) 15 animals.

b) 19 animals.

c) 25 animals.

10. Agustín had 6 euros and his father gave him 6. He bought a book that cost 11 euros.

How much money does he have now?

a) 21 Euros.

b) 2 Euros.

c) 1 Euro.