13 - 3



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 - 3 =

4 + 2 =

6 + 9 =

8 + 6 =

10 + 10 =

2 + 6 =

15 - 6 =

13 - 5 =

9 - 7 =

13 - 11 =








Combined operations

1 + 6 - 1 =

6 + 1 - 5 =

6 - 1 - 3 =

7 - 6 + 2 =

6 + 1 - 6 =

6 + 11 - 8 =

11 + 9 + 7 =

7 + 11 - 8 =

8 + 6 - 6 =

11 + 9 - 6 =








Problems


1. In a kiosk I bought a comic at 20 cents and a seed bag at 60 cents.

How much money did I pay?

a) 80 cents.

b) 40 cents.

c) 30 cents

 


2. Mary had 4 butterflies and one day, she set free 2 of them.

How many butterflies does she have left?

a) 6 butterflies.

b) 2 butterflies.

c) 1 butterfly.

 


3. John has 9 marbles and Amado has 10 marbles more than him.

How many marbles does Amado have?

a) 19 marbles.

b) 1 marble.

c) 8 marbles.

 


4. Sebastian had 9 marbles and he won 9 when he was playing with his friends.

How many marbles does he have now?

a) 21 marbles.

b) 18 marbles.

c) 23 marbles.

 


5. Joaquina has 5 CDs at home, Felisa has 2 and Mercedes has 3.

How many CDs are there altogether?

a) 10 CDs.

b) 8 CDs.

c) 7 CDs.

 


6. A gardener planted 5 trees in a corner of the garden and then 5 trees in another corner. At the end, 2 trees died.

How many trees are there in the garden?

a) 12 trees.

b) 10 trees.

c) 8 trees.

 


7. When I went to the recess, I had 9 marbles. I won 4 marbles in a game and then I lost 5.

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

a) 18 marbles.

b) 6 marbles.

c) 8 marbles.

 


8. Mr. Joaquin had 6 CDs in his store, he brought 6 CDs from the storehouse and then he sold 7.

How many CDs are left in his store?

a) 5 CDs.

b) 17 CDs.

c) 6 CDs.

 


9. To make an installation, we bought 12 meters of cable. First, we used 2 meters and then 7.

How many meters of cable are left?

a) 21 meters.

b) 4 meters.

c) 3 meters.

 


10. 10 people travel in a bus. If 6 of them get down and then 5 people get in.

How many people are there on the bus?

a) 8 people.

b) 21 people.

c) 9 people.



 


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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