12 - 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

 12 - 2 = 3 + 6 = 5 + 2 = 7 + 8 = 9 + 8 = 11 + 8 = 11 - 4 = 8 - 6 = 18 - 8 = 15 - 10 =

# Combined operations

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

# Problems

1. Maricarmen had 6 chocolates and she ate 5 in the morning.

How many chocolates does she have left?

a) 11 chocolates.

b) 30 chocolates.

c) 1 chocolate.

2. Marta has a collection of 6 dolls. He gave 5 of them.

How many dolls does Marta have left?

a) 11 dolls.

b) 1 doll.

c) 4 dolls.

3. I had 10 marbles and I lost 6 when I was playing.

How many marbles do I have now?

a) 16 marbles.

b) 12 marbles.

c) 4 marbles.

4. There were 8 liters of water in a jar and I take out 6 liters.

How many liters are left?

a) 14 liters.

b) 2 liters.

c) 4 liters.

5. Marina had 6 books on her bookcase. She received 2 in her birthday and she lent 5 to her friends.

How many books does she have now?

a) 13 books.

b) 4 books.

c) 3 books.

6. I had 8 canaries in a cage. I sold 4 and 1 escaped.

How many canaries do I have now?

a) 3 canaries.

b) 4 canaries.

c) 2 canaries.

7. There were 7 planes in the runway. 2 of them depart and 4 other planes arrive.

How many planes are there in the runway?

a) 13 planes.

b) 9 planes.

c) 10 planes.

8. A school bus transports 9 children. At the first stop, 6 children get down and then 6 get in.

How many children are there on the bus?

a) 21 children.

b) 8 children.

c) 9 children.

9. My mom has spent 8 euros in apples, 9 in bananas and 9 in oranges.

How much money did she spend altogether?

a) 26 Euros.

b) 17 Euros.

c) 18 Euros.

10. José Juan has 13 euros in his pocket. He spend 4 euros in candies and 3 in seed bags.

How much money does he have left?

a) 20 Euros.

b) 6 Euros.

c) 5 Euros.