10 - 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

10 - 2 =

3 + 3 =

5 + 4 =

7 + 10 =

9 + 11 =

11 + 10 =

6 - 4 =

10 - 6 =

16 - 8 =

20 - 10 =






Combined operations

7 -  6 + 1 =

1 + 3 + 5 =

5 - 4 + 3 =

2 + 3 - 1 =

2 + 2 + 4 =

8 + 7 - 7 =

8 - 6 + 8 =

10 + 8 - 10 =

10 + 10 + 11 =

7 + 7 - 10 =






Problems


1. Arturo is 5 years old and his brother is 4 years younger.

How old is the brother?

a) 9 years.

b) 1 year.

c) 6 years.

 


2. Mary had 6 chocolates and she ate 2 in the morning.

How many chocolates does she have left?

a) 8 chocolates.

b) 5 chocolates.

c) 4 chocolates.

 


3. There were 9 rabbits in a farm. 8 of them died because of an epidemic.

How many rabbits are left in the farm?

a) 17 rabbits.

b) 1 rabbit.

c) 7 rabbits.

 


4. I had 11 marbles and I lost 10 marbles when I was playing.

How many marbles do I have left?

a) 21 marbles.

b) 14 marbles.

c) 1 marble.

 


5. There were 6 planes in the runway. 3 of them depart and then 2 arrive.

How many planes are there in the runway?

a) 11 planes.

b) 5 planes.

c) 4 planes.

 


6. Pepita has 3 CDs at home, María Luisa has 3 and Amparo has 2.

How many discs are there altogether?

a) 8 CDs.

b) 6 CDs.

c) 5 CDs.

 


7. A gardener planted 5 trees in a corner of the garden and then 4 trees in another corner. At the end, 6 trees died.

How many trees are there in the garden?

a) 9 trees.

b) 15 trees.

c) 3 trees.

 


8. Fernando had 11 euros in his pocket. He spend 8 euros in candies and 1 in a seed bag.

How much money does he have left?

a) 20 Euros.

b) 2 Euros.

c) 3 Euros.

 


9. Mr. Luis had 10 CDs in his store, he brought 6 CDs from the storehouse and then he sold 11.

How many CDs are there in the store?

a) 5 CDs.

b) 27 CDs.

c) 6 CDs.

 


10. To make an installation, we bought 14 meters of cable. First, we used 6 meter and then 2.

How many meters of cable are left?

a) 22 meters.

b) 5 meters.

c) 6 meters.



 




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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