今天的数学课上,唐老师出示了一幅扇形统计图(图1),接着说:“这是我家上个月支出情况的统计图,其中伙食费占30%,水、电、煤气和电话费占10%,教育文化支出占5%,储蓄占40%,其他占15%,你们能分别在图2中标出来吗?”同学们各显神通,不一会儿就完成了任务。那么,他们是怎么想的呢?明明说:“在这五项支出中,储蓄与水、电、煤气和电话费这两项合起来正好占总 In today’s math class, Teacher Tang presented a fan-shaped chart (Figure 1) and added: ”This is a statistical chart of my family’s spending last month, including 30% of meals, water, electricity, gas and Phone calls accounted for 10%, educational and cultural expenditure accounted for 5%, savings accounted for 40%, others accounted for 15%, you can be marked separately in Figure 2? “Students were superb, and soon completed the task. Well, what did they think? Clearly: ”Of the five expenditures, savings account for the combined total of water, electricity, gas and telephone charges