13 - 2

 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

 13 - 2 = 3 + 7 = 5 + 6 = 7 + 5 = 9 + 9 = 11 + 5 = 8 - 4 = 12 - 6 = 19 - 8 = 18 - 10 =

# Combined operations

 4 + 1 - 4 = 6 + 5 - 1 = 3 - 2 - 0 = 6 + 2 + 4 = 3 + 4 - 1 = 11 + 9 + 7 = 9 + 9 - 9 = 10 - 6 + 10 = 11 - 7 + 10 = 6 + 7 -11 =

# Problems

1. José has 5 trading cards and Tomás has 4.

How many trading cards are there altogether?

a) 1 card.

b) 6 cards.

c) 9 cards.

2. Julian is 4 years old and his brother is 2 years younger.

How old is the brother?

a) 6 years.

b) 2 years.

c) 5 years.

3. Mary has a collection of stamps. In a store she bought 9 stamps and then she bought 9 in another store.

How many stamps does she have altogether?

a) 16 stamps.

b) 14 stamps.

c) 18 stamps.

4. There were 8 rabbits in a farm and 5 of them died because of an epidemic.

How many rabbits are left in the farm?

a) 13 rabbits.

b) 3 rabbits.

c) 4 rabbits.

5. A gardener planted 6 trees in a corner of the garden and then 3 trees in another corner. At the end, 6 trees died.

How many trees are left in the garden?

a) 15 trees.

b) 2 trees.

c) 3 trees.

6. When I went out to the recess, I had 4 marbles. I won 3 marbles in the game and then I lost 3.

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

a) 4 marbles.

b) 6 marbles.

c) 10 marbles.

7. There are 2 people in a movie theater. 3 people come in and then 4 come out.

How many people are left in the movie theater?

a) 2 people.

b) 9 people.

c) 1 people.

8. To make an installation, we bought 13 meters of cable. First, we used 9 meters and then 2.

How many meters of cable are left?

a) 2 meters.

b) 3 meters.

c) 24 meters.

9. 10 people travel in a bus. If 6 of them get down and then 11 people get in

How many people are there in the bus?

a) 14 people.

b) 27 people.

c) 15 people.

10. In a circus there were 7 elephants, 9 tigers and 11 monkeys.

How many animals were there in the circus?

a) 20 animals.

b) 16 animals.

c) 27 animals.