Are you looking for that extra challenge? Are your pupils confident with adding and subtracting 1, 10 , 100 and 1000? Our Year 4 1 10 100 1000 More or Less Discussion Problem has been created to develop team-work, problem solving and reasoning skills through two thought-provoking activities! Children can work in pairs or groups to find not one but two different answers before assessing their hard work with our answer sheet!