Save guides, add subjects and pick up where you left off with your BBC account. a) We have \({+5}\) and \({-4}\). The signs are different, so the answer will be negative. So, \(+5 \times -4 = -20 ...

Same signs give a positive: \((-4) \times (-5) = 20\) Same signs give a positive: \(20 \div 5 = 4\) Different signs give a negative: \((-14) \div 2 = -7\) Different ...

Sufficiently desperate, while awaiting my turn during a recent, non-emergency visit to a doctor, to scan your newspaper's small print, I came across, in the Almanac section of the weather report ...