Pick the word/s which fill the gap/s to make the best sensible English.In mathematics, sometimes we just have to guess a number and see if it works out right in the calculation. If it isn't right, we try again with a slightly different number (bigger or smaller) until we find the right one. Back in the 'bad old days' this method was called ' ... ... ', but now we call it ' ... ... ' !

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Pick the word/s which fill the gap/s to make the best sensible English.<br />In mathematics, sometimes we just have to guess a number and see if it works out right in the calculation. If it isn't right, we try again with a slightly different number (bigger or smaller) until we find the right one. <br>Back in the 'bad old days' this method was called ' ... ... ', but now we call it ' ... ... ' !