Actually, my elementary school math textbooks were American, awkwardly pasted over to use metric for the measurement unit, so I can keep the Imperial liquid mea

Actually, my elementary school math textbooks were American, awkwardly pasted over to use metric for the measurement unit, so I can keep the Imperial liquid measurements straight by just remembering that there are "2 half litres (pints) to the litre (quart)" and "4 litres (quarts) to the 4 litre bag (gallon)" (because milk comes in bags here)