14.examine your answer to see if it is reasonable with respect to the information given.
15.填空题几个注意:1要先点选输入框 2删除要用backspace 3负号就用那个连词符号 4如果要改成正的,再次输入连词符号就变成正数了 5计算器上的transfer display可以直接把计算器里得出的结果转到输入框里面 6 2.5和2.50是一样的 7 除非要求四舍五入,否则不要输入近似值 8如果是分数,一般分子和分母是两个独立的框 9分数不必须约分
16.scan the data presentation briefly to see what it is about, but do not spend time studying all of the information in detail
17.bar graphs and circle graphs, as well as other graphical displays of data, are drawn to scale, so you can read or estimate data visually from such graphs.
18.the questions are to be answered only on the basis of the data presented, everyday facts , and your knowledge of mathematics.
19.MR表示 memory recall, M+ 表示memory sum, MC 表示 memory clear.
20.当第一次按M+,屏幕上显示的数字被纪录在计算器的内存里面,屏幕右边出现M字母,表示内存记忆被使用。以后每一次按M+按键,都会把当前的屏幕上显示的数字加到内存的数字上,并以得到的和来取代原来内存的记忆值。当按MR按键的时候,内存里面记忆的值被调出,就是最后的结果。如果要清空内存,按MC按键,这个时候右边的M标志就消失了
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