Maths: We are solving Maths Number questions.

Question
George has 12 drinks and Roneeza has 10 drinks.  How many drinks to they have altogether?

Roneeza said that we needed to use addition to work out the answer.  
We made tens and used addition to help us to answer the question.
We said that
   12  + 10
= 10 + 2 + 10
= 10 + 10 + 2
= 20 + 2
= 22

Answer:  They had 22 drinks altogether.

Question
Roneeza and Oliver bought 18 soccer balls and 10 bouncy balls. How many balls did they buy altogether?
We made tens to help us to answer the question.
We said that
   18 + 10
= 10 + 8 + 10
= 10 + 10 + 8
= 28

Answer:  They bought 28 balls altogether.


Question
Oliver and George went to McDonald's.  They bought some burgers that cost $54.00 altogether.  Then they bought some frozen cokes that cost $20.00 altogether.  How much did their food cost altogether?
We made tens to help us to answer the question.
We said that
   54 + 20
=  50 + 4+ 20
= 50 + 20 +4
= 70 + 4
= 74

Answer:  Their food costs $74.00 altogether.

Question
George, Oliver and Roneeza went to the Warehouse.  They bought a soccer ball which cost $12.00, a basketball which cost $11.00 and a controller for an X-Box which cost $10.00.  How much money did they spend?

George, Oliver and Roneeza used addition to solve our question.
We made tens to help us to answer the question.
We said that
   12.00 + 11.00 + 10 
= 10 + 2 + 10 + 1 + 10
= 10 + 10 + 10 + 2 + 1
= 30 + 3
= 33

Answer:  We spend $33.00 at the Warehouse.