Addition and subtraction:Solving problems using mental and written methods

04.15.2020
10:49:50


Our topic for today is addition and subtraction

Use mental and written method


Mental method is that when you compute without pencil and paper
Written method is that when ypu need pencil and paper


To solve mentally you will use rounding, adjusting, compensation or partitioning to calculate in your mind 


Watch this video to learn more on mental method








T o answer practise #1 use written method. On page 133 learners book and #3 on page 134








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