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.