(1)在计算器上依次输入3.17,^,3,﹣1.25,=1.9355013;
再依次输入÷5.23=,可得结果为0.387(结果保留三位小数),
即:(3.17 3﹣1.25)÷5.23的值保留三位小数为0.387;
(2)原式=﹣1+30×(
+
﹣
)﹣2011
=﹣1+12+25﹣32﹣2011
=﹣2007.
(1)在计算器上依次输入3.17,^,3,﹣1.25,=1.9355013;
再依次输入÷5.23=,可得结果为0.387(结果保留三位小数),
即:(3.17 3﹣1.25)÷5.23的值保留三位小数为0.387;
(2)原式=﹣1+30×(
+
﹣
)﹣2011
=﹣1+12+25﹣32﹣2011
=﹣2007.