There is more than one way
to solve a problem.

  To solve a problem you need to follow these important steps:
                       Step 1:  Understand the problem.
                       Step 2:  Make a plan.
                               This is were you choose the best strategy.
                       Step 3:  Carry out the plan.
                       Step 4:  Look Back.
 

Let's look at some strategies to solve a problem.

Billy is only allowed to watch 45 minutes of television each day.  One afternoon, he watched 36 minutes of television. How many more minutes of television is Billy allowed to watch for the rest of the day?

 

  Strategy 2 : Counting Back
    45 take away 5 = 40
    40 take away 4 = 36
    5 + 4 = 9 minutes

   Strategy 3 : Estimation
    36 is close to 35
    45 - 35 = 10
    Billy has about 10 minutes left.

Let's try some more strategies to solve a problem.

  Strategy 1 : Add Hundreds, Tens, Ones
     Combine hundreds → 100 + 200 =

  Strategy 2 : Use representation
         173  
 and  216

 equals    
               
                  or 389