石虎場主要規劃新農場。第 1、2 關讓空拍機飛到適合的高度:一格邊長 10 公尺就是 1 公畝,邊長 100 公尺是 1 公頃,邊長 1 公里是 1 平方公里。飛太低田地拍不完整,飛太高格子比要的單位大。拍好後數一數田地有幾格,再換成小一級的單位(6 公頃 = 600 公畝)。第 3 關把一袋袋收成裝上卡車,秤上只顯示公斤,要裝剛好「2 公噸 300 公斤」或「2.3 公噸」;也會用「幾公頃 × 每公頃收成幾公斤」算出一共幾公噸。
適合年級:五年級(約 10~11 歲)。對應 108 課綱(十二年國教)數學單元:五年級「公畝、公頃、平方公里和公噸」。各版本教科書的單元順序不同,完整對照請看國小數學課綱對照表。免費、無廣告、不用註冊,手機、平板、電腦打開就能玩,題目有注音,也會念出來。
陪玩小提醒:面積單位每升一級是 100 倍,不是 10 倍,因為邊長是 10 倍,面積是 10 × 10 倍。可以帶孩子估一估學校操場大約幾公畝。
Leopard Cat is planning a new farm. In levels 1 and 2 children fly a drone to the right height: a square 10 m wide is 1 are, 100 m wide is 1 hectare and 1 km wide is 1 square km. Too low and the field doesn’t fit; too high and each square is bigger than the unit asked for. They count the squares in the field, then change to the next smaller unit (6 hectares = 600 ares). In level 3 they load sacks onto a truck whose scale shows only kilograms, aiming for exactly “2 tonnes 300 kg” or “2.3 tonnes”, and work out a harvest in tonnes from hectares × kg per hectare.
Suits Grade 5 (about age 10–11) in Taiwan. Taiwan curriculum (12-year basic education) unit: Ares, hectares, square kilometres and tonnes (Grade 5). Free with no ads and no sign-up, in Traditional Chinese with zhuyin and in English, read aloud. See the Taiwan elementary maths curriculum map.