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Topic, The topic where you can only post the most random things you can think of that doesn't make sense... | ||||||
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You must register or log in to post a message.![]() If you do 23 + 19 as a column, 3+9=12, 2+1=3, but the 1 from the 12 is carried to give 42 in the end result. With this method, you don't need to carry, and furthermore if you only need a rough estimate you can do that more quickly. This is the essence of mental or even written arithmetic, learning different tricks that you can use to make calculations easier or harder. Here's an example - if you are to calculate 144/4 in your head, how would you do it? So long as you get the correct answer, there may not be one 'correct' way, but you may be able to do it quicker with a different way. 600+100=700 700+30+60+80+70=940 940+5+4+3+9+5=966 Answer is 966. |