3 + 1

 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

 3 + 1 = 5 + 5 = 7 + 6 = 9 + 4 = 11 + 6 = 4 - 2 = 13 - 4 = 11 - 6 = 10 - 8 = 17 - 10 =

# Combined operations

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

# Problems

1. Antonio has 3 trading cards and Juan Gaspar has 4.

How many cards are there altogether?

a) 1 card.

b) 8 cards.

c) 7 cards.

2. Santiago is 6 years old and his brother is 5 years younger.

How old is his brother?

a) 11 years.

b) 1 year.

c) 4 years.

3. Jesus has a stamp collection. He bought 11 stamps in a store and then, he bought 8 stamps in another store.

How many stamps does he have altogether?

a) 3 stamps.

b) 12 stamps.

c) 19 stamps.

4. There are 8 rabbits in a farm. 6 of them died because of an epidemic.

How many rabbits are left in the farm?

a) 14 rabbits.

b) 2 rabbits.

c) 10 rabbits.

5. A gardener planted 4 trees in a corner of the garden and then 4 trees in another corner. At the end, 3 trees died.

How many trees are left in the garden?

a) 11 trees.

b) 2 trees.

c) 5 trees.

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

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

a) 3 marbles.

b) 5 marbles.

c) 15 marbles.

7. There are 5 people in a movie theater. 4 people come in and 4 people come out.

How many people are left in the movie theater?

a) 3 people.

b) 13 people.

c) 5 people.

8. To make an installation, we bought 11 meters of cable. First, we used 7 and then 2 meters.

How many meters of cable are left?

a) 2 meters.

b) 20 meters.

c) 18 meters.

9. 8 people travel in a bus. If 6 of them get down and then 9 people get in.

How many people are left in the bus?

a) 23 people.

b) 10 people.

c) 11 people.

10. In a circus there were 8 elephants, 11 tigers and 7 monkeys.

How many animals were there in the circus?

a) 19 animals.

b) 18 animals.

c) 26 animals.

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®Arturo Ramo García.-Record of intellectual property of Teruel (Spain) No 141, of 29-IX-1999
Plaza Playa de Aro, 3, 1º DO 44002-TERUEL

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