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one addition strategy we learned is called the air away and the airway is basically adding one unit at a time meaning we add the hundreds then we add the tens then we add the ones lets take a look at it at an example 245 plus 324 Im gonna start with 245 gonna draw an arrow the arrow just represents that Im changing this number and were writing how were changing it above the arrow so I know were adding so Im gonna put a plus sign now I know were adding three hundreds and the value of three hundreds is 300 so were first solving two hundred forty five plus three hundred students can skip count on such as 245 345 445 545 or they can just use their knowledge of place value and know that we have two hundredths were adding three more and were ending up with five hundreds and the tens and ones will stay the same because we didnt add any tens or ones alright now that weve added the hundreds were going to add the tens I know were adding two tens the value of two tens is 20 so we h